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Finding the Fourth Proportional to 1,332,136, 1,838,391.42 and 728,524

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Solution

The fourth proportional to 1,332,136, 1,838,391.42 and 728,524 is: 1,005,387.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332,136 : 1,838,391.42 = 728,524 : x
  2. Step 2: Convert to fraction form
    1,332,136/1,838,391.42 = 728,524/x
  3. Step 3: Cross multiply
    1,332,136x = 1,838,391.42 × 728,524
  4. Step 4: Simplify right side
    1,332,136x = 1,339,312,270,864.08
  5. Step 5: Solve for x
    x = 1,339,312,270,864.08/1,332,136
  6. Step 6: Final answer
    x = 1,005,387.04

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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.