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Finding the Fourth Proportional to 710,997.91, 981,177.05 and 388,707.93

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Solution

The fourth proportional to 710,997.91, 981,177.05 and 388,707.93 is: 536,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,997.91 : 981,177.05 = 388,707.93 : x
  2. Step 2: Convert to fraction form
    710,997.91/981,177.05 = 388,707.93/x
  3. Step 3: Cross multiply
    710,997.91x = 981,177.05 × 388,707.93
  4. Step 4: Simplify right side
    710,997.91x = 381,391,294,714.95
  5. Step 5: Solve for x
    x = 381,391,294,714.95/710,997.91
  6. Step 6: Final answer
    x = 536,416.90

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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.