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Finding the Fourth Proportional to 532,979.40, 798,432.30 and 321,990.60

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Solution

The fourth proportional to 532,979.40, 798,432.30 and 321,990.60 is: 482,359.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    532,979.40 : 798,432.30 = 321,990.60 : x
  2. Step 2: Convert to fraction form
    532,979.40/798,432.30 = 321,990.60/x
  3. Step 3: Cross multiply
    532,979.40x = 798,432.30 × 321,990.60
  4. Step 4: Simplify right side
    532,979.40x = 257,087,695,336.38
  5. Step 5: Solve for x
    x = 257,087,695,336.38/532,979.40
  6. Step 6: Final answer
    x = 482,359.53

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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.