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Finding the Fourth Proportional to 715,072.65, 986,773.71 and 392,763.52

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Solution

The fourth proportional to 715,072.65, 986,773.71 and 392,763.52 is: 541,999.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,072.65 : 986,773.71 = 392,763.52 : x
  2. Step 2: Convert to fraction form
    715,072.65/986,773.71 = 392,763.52/x
  3. Step 3: Cross multiply
    715,072.65x = 986,773.71 × 392,763.52
  4. Step 4: Simplify right side
    715,072.65x = 387,568,715,783.06
  5. Step 5: Solve for x
    x = 387,568,715,783.06/715,072.65
  6. Step 6: Final answer
    x = 541,999.08

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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.