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Finding the Fourth Proportional to 690,614, 1,036,390.80 and 247,382

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Solution

The fourth proportional to 690,614, 1,036,390.80 and 247,382 is: 371,241.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,614 : 1,036,390.80 = 247,382 : x
  2. Step 2: Convert to fraction form
    690,614/1,036,390.80 = 247,382/x
  3. Step 3: Cross multiply
    690,614x = 1,036,390.80 × 247,382
  4. Step 4: Simplify right side
    690,614x = 256,384,428,885.60
  5. Step 5: Solve for x
    x = 256,384,428,885.60/690,614
  6. Step 6: Final answer
    x = 371,241.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.