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Finding the Fourth Proportional to 710,888.28, 981,092.88 and 388,645.96

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Solution

The fourth proportional to 710,888.28, 981,092.88 and 388,645.96 is: 536,368.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,888.28 : 981,092.88 = 388,645.96 : x
  2. Step 2: Convert to fraction form
    710,888.28/981,092.88 = 388,645.96/x
  3. Step 3: Cross multiply
    710,888.28x = 981,092.88 × 388,645.96
  4. Step 4: Simplify right side
    710,888.28x = 381,297,784,196.77
  5. Step 5: Solve for x
    x = 381,297,784,196.77/710,888.28
  6. Step 6: Final answer
    x = 536,368.08

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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.