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Finding the Fourth Proportional to 581,516.77, 871,384.85 and 391,272.47

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Solution

The fourth proportional to 581,516.77, 871,384.85 and 391,272.47 is: 586,309.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    581,516.77 : 871,384.85 = 391,272.47 : x
  2. Step 2: Convert to fraction form
    581,516.77/871,384.85 = 391,272.47/x
  3. Step 3: Cross multiply
    581,516.77x = 871,384.85 × 391,272.47
  4. Step 4: Simplify right side
    581,516.77x = 340,948,902,580.08
  5. Step 5: Solve for x
    x = 340,948,902,580.08/581,516.77
  6. Step 6: Final answer
    x = 586,309.67

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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.