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Finding the Fourth Proportional to 525,901.80, 788,852.70 and 438,421.80

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Solution

The fourth proportional to 525,901.80, 788,852.70 and 438,421.80 is: 657,632.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,901.80 : 788,852.70 = 438,421.80 : x
  2. Step 2: Convert to fraction form
    525,901.80/788,852.70 = 438,421.80/x
  3. Step 3: Cross multiply
    525,901.80x = 788,852.70 × 438,421.80
  4. Step 4: Simplify right side
    525,901.80x = 345,850,220,668.86
  5. Step 5: Solve for x
    x = 345,850,220,668.86/525,901.80
  6. Step 6: Final answer
    x = 657,632.70

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.