Home / 715,205.30-987,001.57-392,923.51

Finding the Fourth Proportional to 715,205.30, 987,001.57 and 392,923.51

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Solution

The fourth proportional to 715,205.30, 987,001.57 and 392,923.51 is: 542,244.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,205.30 : 987,001.57 = 392,923.51 : x
  2. Step 2: Convert to fraction form
    715,205.30/987,001.57 = 392,923.51/x
  3. Step 3: Cross multiply
    715,205.30x = 987,001.57 × 392,923.51
  4. Step 4: Simplify right side
    715,205.30x = 387,816,119,283.56
  5. Step 5: Solve for x
    x = 387,816,119,283.56/715,205.30
  6. Step 6: Final answer
    x = 542,244.47

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1.5x scale

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.