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Finding the Fourth Proportional to 402,436.20, 604,820.70 and 351,114.60

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Solution

The fourth proportional to 402,436.20, 604,820.70 and 351,114.60 is: 527,689.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,436.20 : 604,820.70 = 351,114.60 : x
  2. Step 2: Convert to fraction form
    402,436.20/604,820.70 = 351,114.60/x
  3. Step 3: Cross multiply
    402,436.20x = 604,820.70 × 351,114.60
  4. Step 4: Simplify right side
    402,436.20x = 212,361,378,152.22
  5. Step 5: Solve for x
    x = 212,361,378,152.22/402,436.20
  6. Step 6: Final answer
    x = 527,689.55

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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.