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Finding the Fourth Proportional to 673,193.78, 929,007.36 and 371,387.78

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Solution

The fourth proportional to 673,193.78, 929,007.36 and 371,387.78 is: 512,515.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,193.78 : 929,007.36 = 371,387.78 : x
  2. Step 2: Convert to fraction form
    673,193.78/929,007.36 = 371,387.78/x
  3. Step 3: Cross multiply
    673,193.78x = 929,007.36 × 371,387.78
  4. Step 4: Simplify right side
    673,193.78x = 345,021,981,034.06
  5. Step 5: Solve for x
    x = 345,021,981,034.06/673,193.78
  6. Step 6: Final answer
    x = 512,515.11

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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.