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Finding the Fourth Proportional to 710,855.28, 981,006.66 and 388,587.24

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Solution

The fourth proportional to 710,855.28, 981,006.66 and 388,587.24 is: 536,264.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,855.28 : 981,006.66 = 388,587.24 : x
  2. Step 2: Convert to fraction form
    710,855.28/981,006.66 = 388,587.24/x
  3. Step 3: Cross multiply
    710,855.28x = 981,006.66 × 388,587.24
  4. Step 4: Simplify right side
    710,855.28x = 381,206,670,431.02
  5. Step 5: Solve for x
    x = 381,206,670,431.02/710,855.28
  6. Step 6: Final answer
    x = 536,264.81

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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.