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Finding the Fourth Proportional to 520,963.20, 781,444.80 and 402,865.20

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Solution

The fourth proportional to 520,963.20, 781,444.80 and 402,865.20 is: 604,297.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,963.20 : 781,444.80 = 402,865.20 : x
  2. Step 2: Convert to fraction form
    520,963.20/781,444.80 = 402,865.20/x
  3. Step 3: Cross multiply
    520,963.20x = 781,444.80 × 402,865.20
  4. Step 4: Simplify right side
    520,963.20x = 314,816,915,640.96
  5. Step 5: Solve for x
    x = 314,816,915,640.96/520,963.20
  6. Step 6: Final answer
    x = 604,297.80

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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.