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Finding the Fourth Proportional to 284,055.56, 391,996.40 and 156,731.16

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Solution

The fourth proportional to 284,055.56, 391,996.40 and 156,731.16 is: 216,288.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,055.56 : 391,996.40 = 156,731.16 : x
  2. Step 2: Convert to fraction form
    284,055.56/391,996.40 = 156,731.16/x
  3. Step 3: Cross multiply
    284,055.56x = 391,996.40 × 156,731.16
  4. Step 4: Simplify right side
    284,055.56x = 61,438,050,487.82
  5. Step 5: Solve for x
    x = 61,438,050,487.82/284,055.56
  6. Step 6: Final answer
    x = 216,288.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.