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Finding the Fourth Proportional to 673,542.72, 929,480.40 and 371,717.28

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Solution

The fourth proportional to 673,542.72, 929,480.40 and 371,717.28 is: 512,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,542.72 : 929,480.40 = 371,717.28 : x
  2. Step 2: Convert to fraction form
    673,542.72/929,480.40 = 371,717.28/x
  3. Step 3: Cross multiply
    673,542.72x = 929,480.40 × 371,717.28
  4. Step 4: Simplify right side
    673,542.72x = 345,503,926,101.31
  5. Step 5: Solve for x
    x = 345,503,926,101.31/673,542.72
  6. Step 6: Final answer
    x = 512,965.13

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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.