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Finding the Fourth Proportional to 351,490.30, 527,235.45 and 257,487.10

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Solution

The fourth proportional to 351,490.30, 527,235.45 and 257,487.10 is: 386,230.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,490.30 : 527,235.45 = 257,487.10 : x
  2. Step 2: Convert to fraction form
    351,490.30/527,235.45 = 257,487.10/x
  3. Step 3: Cross multiply
    351,490.30x = 527,235.45 × 257,487.10
  4. Step 4: Simplify right side
    351,490.30x = 135,756,327,037.70
  5. Step 5: Solve for x
    x = 135,756,327,037.70/351,490.30
  6. Step 6: Final answer
    x = 386,230.65

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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.