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Finding the Fourth Proportional to 621,280.08, 930,702.20 and 321,957

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Solution

The fourth proportional to 621,280.08, 930,702.20 and 321,957 is: 482,304.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,280.08 : 930,702.20 = 321,957 : x
  2. Step 2: Convert to fraction form
    621,280.08/930,702.20 = 321,957/x
  3. Step 3: Cross multiply
    621,280.08x = 930,702.20 × 321,957
  4. Step 4: Simplify right side
    621,280.08x = 299,646,086,595.62
  5. Step 5: Solve for x
    x = 299,646,086,595.62/621,280.08
  6. Step 6: Final answer
    x = 482,304.35

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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.