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Finding the Fourth Proportional to 710,998.91, 981,178.43 and 388,708.93

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Solution

The fourth proportional to 710,998.91, 981,178.43 and 388,708.93 is: 536,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,998.91 : 981,178.43 = 388,708.93 : x
  2. Step 2: Convert to fraction form
    710,998.91/981,178.43 = 388,708.93/x
  3. Step 3: Cross multiply
    710,998.91x = 981,178.43 × 388,708.93
  4. Step 4: Simplify right side
    710,998.91x = 381,392,817,664.38
  5. Step 5: Solve for x
    x = 381,392,817,664.38/710,998.91
  6. Step 6: Final answer
    x = 536,418.29

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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.