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Finding the Fourth Proportional to 291,060.30, 435,715.65 and 172,670.70

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Solution

The fourth proportional to 291,060.30, 435,715.65 and 172,670.70 is: 258,487.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,060.30 : 435,715.65 = 172,670.70 : x
  2. Step 2: Convert to fraction form
    291,060.30/435,715.65 = 172,670.70/x
  3. Step 3: Cross multiply
    291,060.30x = 435,715.65 × 172,670.70
  4. Step 4: Simplify right side
    291,060.30x = 75,235,326,286.46
  5. Step 5: Solve for x
    x = 75,235,326,286.46/291,060.30
  6. Step 6: Final answer
    x = 258,487.08

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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.