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Finding the Fourth Proportional to 316,412.03, 436,658.76 and 173,171.90

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Solution

The fourth proportional to 316,412.03, 436,658.76 and 173,171.90 is: 238,982.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,412.03 : 436,658.76 = 173,171.90 : x
  2. Step 2: Convert to fraction form
    316,412.03/436,658.76 = 173,171.90/x
  3. Step 3: Cross multiply
    316,412.03x = 436,658.76 × 173,171.90
  4. Step 4: Simplify right side
    316,412.03x = 75,617,024,937.55
  5. Step 5: Solve for x
    x = 75,617,024,937.55/316,412.03
  6. Step 6: Final answer
    x = 238,982.78

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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.