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Finding the Fourth Proportional to 690,612, 1,036,387.80 and 247,380

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Solution

The fourth proportional to 690,612, 1,036,387.80 and 247,380 is: 371,238.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,612 : 1,036,387.80 = 247,380 : x
  2. Step 2: Convert to fraction form
    690,612/1,036,387.80 = 247,380/x
  3. Step 3: Cross multiply
    690,612x = 1,036,387.80 × 247,380
  4. Step 4: Simplify right side
    690,612x = 256,381,613,964
  5. Step 5: Solve for x
    x = 256,381,613,964/690,612
  6. Step 6: Final answer
    x = 371,238.28

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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.