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Finding the Fourth Proportional to 674,008.32, 930,129.84 and 387,514.56

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Solution

The fourth proportional to 674,008.32, 930,129.84 and 387,514.56 is: 534,769.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,008.32 : 930,129.84 = 387,514.56 : x
  2. Step 2: Convert to fraction form
    674,008.32/930,129.84 = 387,514.56/x
  3. Step 3: Cross multiply
    674,008.32x = 930,129.84 × 387,514.56
  4. Step 4: Simplify right side
    674,008.32x = 360,438,855,690.47
  5. Step 5: Solve for x
    x = 360,438,855,690.47/674,008.32
  6. Step 6: Final answer
    x = 534,769.15

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Double scale
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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.