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Finding the Fourth Proportional to 522,020.40, 783,030.60 and 321,691.20

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Solution

The fourth proportional to 522,020.40, 783,030.60 and 321,691.20 is: 482,536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,020.40 : 783,030.60 = 321,691.20 : x
  2. Step 2: Convert to fraction form
    522,020.40/783,030.60 = 321,691.20/x
  3. Step 3: Cross multiply
    522,020.40x = 783,030.60 × 321,691.20
  4. Step 4: Simplify right side
    522,020.40x = 251,894,053,350.72
  5. Step 5: Solve for x
    x = 251,894,053,350.72/522,020.40
  6. Step 6: Final answer
    x = 482,536.80

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Similar ratio
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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.