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Finding the Fourth Proportional to 525,118.75, 724,663.88 and 286,654.75

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Solution

The fourth proportional to 525,118.75, 724,663.88 and 286,654.75 is: 395,583.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,118.75 : 724,663.88 = 286,654.75 : x
  2. Step 2: Convert to fraction form
    525,118.75/724,663.88 = 286,654.75/x
  3. Step 3: Cross multiply
    525,118.75x = 724,663.88 × 286,654.75
  4. Step 4: Simplify right side
    525,118.75x = 207,728,341,922.16
  5. Step 5: Solve for x
    x = 207,728,341,922.16/525,118.75
  6. Step 6: Final answer
    x = 395,583.56

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Half scale
Find fourth proportional to 1,050,237.50, 1,449,327.75 and 573,309.50
Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.