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Finding the Fourth Proportional to 579,964.20, 869,946.30 and 486,652.20

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Solution

The fourth proportional to 579,964.20, 869,946.30 and 486,652.20 is: 729,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,964.20 : 869,946.30 = 486,652.20 : x
  2. Step 2: Convert to fraction form
    579,964.20/869,946.30 = 486,652.20/x
  3. Step 3: Cross multiply
    579,964.20x = 869,946.30 × 486,652.20
  4. Step 4: Simplify right side
    579,964.20x = 423,361,280,776.86
  5. Step 5: Solve for x
    x = 423,361,280,776.86/579,964.20
  6. Step 6: Final answer
    x = 729,978.30

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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.