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Finding the Fourth Proportional to 486,760.97, 671,293.77 and 405,358.77

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Solution

The fourth proportional to 486,760.97, 671,293.77 and 405,358.77 is: 559,031.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,760.97 : 671,293.77 = 405,358.77 : x
  2. Step 2: Convert to fraction form
    486,760.97/671,293.77 = 405,358.77/x
  3. Step 3: Cross multiply
    486,760.97x = 671,293.77 × 405,358.77
  4. Step 4: Simplify right side
    486,760.97x = 272,114,816,915.86
  5. Step 5: Solve for x
    x = 272,114,816,915.86/486,760.97
  6. Step 6: Final answer
    x = 559,031.71

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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.