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Finding the Fourth Proportional to 690,613, 1,036,389.30 and 247,381

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Solution

The fourth proportional to 690,613, 1,036,389.30 and 247,381 is: 371,239.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,613 : 1,036,389.30 = 247,381 : x
  2. Step 2: Convert to fraction form
    690,613/1,036,389.30 = 247,381/x
  3. Step 3: Cross multiply
    690,613x = 1,036,389.30 × 247,381
  4. Step 4: Simplify right side
    690,613x = 256,383,021,423.30
  5. Step 5: Solve for x
    x = 256,383,021,423.30/690,613
  6. Step 6: Final answer
    x = 371,239.78

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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.