Home / 520,829.40-781,244.10-307,939.80

Finding the Fourth Proportional to 520,829.40, 781,244.10 and 307,939.80

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Solution

The fourth proportional to 520,829.40, 781,244.10 and 307,939.80 is: 461,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,829.40 : 781,244.10 = 307,939.80 : x
  2. Step 2: Convert to fraction form
    520,829.40/781,244.10 = 307,939.80/x
  3. Step 3: Cross multiply
    520,829.40x = 781,244.10 × 307,939.80
  4. Step 4: Simplify right side
    520,829.40x = 240,576,151,905.18
  5. Step 5: Solve for x
    x = 240,576,151,905.18/520,829.40
  6. Step 6: Final answer
    x = 461,909.70

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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.