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Finding the Fourth Proportional to 719,710.96, 993,209.16 and 397,420.60

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Solution

The fourth proportional to 719,710.96, 993,209.16 and 397,420.60 is: 548,444.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,710.96 : 993,209.16 = 397,420.60 : x
  2. Step 2: Convert to fraction form
    719,710.96/993,209.16 = 397,420.60/x
  3. Step 3: Cross multiply
    719,710.96x = 993,209.16 × 397,420.60
  4. Step 4: Simplify right side
    719,710.96x = 394,721,780,292.70
  5. Step 5: Solve for x
    x = 394,721,780,292.70/719,710.96
  6. Step 6: Final answer
    x = 548,444.86

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Half scale
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Double scale
Find fourth proportional to 719,711.96, 993,210.54 and 397,421.60
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.