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Finding the Fourth Proportional to 580,808.40, 870,046.20 and 391,851.60

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Solution

The fourth proportional to 580,808.40, 870,046.20 and 391,851.60 is: 586,990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,808.40 : 870,046.20 = 391,851.60 : x
  2. Step 2: Convert to fraction form
    580,808.40/870,046.20 = 391,851.60/x
  3. Step 3: Cross multiply
    580,808.40x = 870,046.20 × 391,851.60
  4. Step 4: Simplify right side
    580,808.40x = 340,928,995,543.92
  5. Step 5: Solve for x
    x = 340,928,995,543.92/580,808.40
  6. Step 6: Final answer
    x = 586,990.47

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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.