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Finding the Fourth Proportional to 508,451.38, 701,991.59 and 315,064.30

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Solution

The fourth proportional to 508,451.38, 701,991.59 and 315,064.30 is: 434,992.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,451.38 : 701,991.59 = 315,064.30 : x
  2. Step 2: Convert to fraction form
    508,451.38/701,991.59 = 315,064.30/x
  3. Step 3: Cross multiply
    508,451.38x = 701,991.59 × 315,064.30
  4. Step 4: Simplify right side
    508,451.38x = 221,172,488,909.24
  5. Step 5: Solve for x
    x = 221,172,488,909.24/508,451.38
  6. Step 6: Final answer
    x = 434,992.41

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Double scale
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Similar ratio
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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.