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Finding the Fourth Proportional to 580,011.40, 870,192.06 and 391,229.56

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Solution

The fourth proportional to 580,011.40, 870,192.06 and 391,229.56 is: 586,962.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,011.40 : 870,192.06 = 391,229.56 : x
  2. Step 2: Convert to fraction form
    580,011.40/870,192.06 = 391,229.56/x
  3. Step 3: Cross multiply
    580,011.40x = 870,192.06 × 391,229.56
  4. Step 4: Simplify right side
    580,011.40x = 340,444,856,749.29
  5. Step 5: Solve for x
    x = 340,444,856,749.29/580,011.40
  6. Step 6: Final answer
    x = 586,962.35

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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.