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Finding the Fourth Proportional to 456,495.70, 684,743.55 and 219,781.30

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Solution

The fourth proportional to 456,495.70, 684,743.55 and 219,781.30 is: 329,671.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,495.70 : 684,743.55 = 219,781.30 : x
  2. Step 2: Convert to fraction form
    456,495.70/684,743.55 = 219,781.30/x
  3. Step 3: Cross multiply
    456,495.70x = 684,743.55 × 219,781.30
  4. Step 4: Simplify right side
    456,495.70x = 150,493,827,585.62
  5. Step 5: Solve for x
    x = 150,493,827,585.62/456,495.70
  6. Step 6: Final answer
    x = 329,671.95

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Similar ratio
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1.5x scale

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.