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Finding the Fourth Proportional to 520,348.80, 781,106.40 and 402,542.40

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Solution

The fourth proportional to 520,348.80, 781,106.40 and 402,542.40 is: 604,264.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,348.80 : 781,106.40 = 402,542.40 : x
  2. Step 2: Convert to fraction form
    520,348.80/781,106.40 = 402,542.40/x
  3. Step 3: Cross multiply
    520,348.80x = 781,106.40 × 402,542.40
  4. Step 4: Simplify right side
    520,348.80x = 314,428,444,911.36
  5. Step 5: Solve for x
    x = 314,428,444,911.36/520,348.80
  6. Step 6: Final answer
    x = 604,264.76

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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.