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Finding the Fourth Proportional to 287,592.90, 431,389.35 and 252,600.90

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Solution

The fourth proportional to 287,592.90, 431,389.35 and 252,600.90 is: 378,901.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,592.90 : 431,389.35 = 252,600.90 : x
  2. Step 2: Convert to fraction form
    287,592.90/431,389.35 = 252,600.90/x
  3. Step 3: Cross multiply
    287,592.90x = 431,389.35 × 252,600.90
  4. Step 4: Simplify right side
    287,592.90x = 108,969,338,060.42
  5. Step 5: Solve for x
    x = 108,969,338,060.42/287,592.90
  6. Step 6: Final answer
    x = 378,901.35

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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.