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Finding the Fourth Proportional to 673,179.78, 928,988.04 and 371,373.78

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Solution

The fourth proportional to 673,179.78, 928,988.04 and 371,373.78 is: 512,495.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,179.78 : 928,988.04 = 371,373.78 : x
  2. Step 2: Convert to fraction form
    673,179.78/928,988.04 = 371,373.78/x
  3. Step 3: Cross multiply
    673,179.78x = 928,988.04 × 371,373.78
  4. Step 4: Simplify right side
    673,179.78x = 345,001,799,989.59
  5. Step 5: Solve for x
    x = 345,001,799,989.59/673,179.78
  6. Step 6: Final answer
    x = 512,495.79

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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.