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Finding the Fourth Proportional to 581,515.27, 871,382.60 and 391,270.97

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Solution

The fourth proportional to 581,515.27, 871,382.60 and 391,270.97 is: 586,307.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,515.27 : 871,382.60 = 391,270.97 : x
  2. Step 2: Convert to fraction form
    581,515.27/871,382.60 = 391,270.97/x
  3. Step 3: Cross multiply
    581,515.27x = 871,382.60 × 391,270.97
  4. Step 4: Simplify right side
    581,515.27x = 340,946,715,143.12
  5. Step 5: Solve for x
    x = 340,946,715,143.12/581,515.27
  6. Step 6: Final answer
    x = 586,307.42

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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.