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Finding the Fourth Proportional to 456,521.20, 684,781.80 and 219,806.80

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Solution

The fourth proportional to 456,521.20, 684,781.80 and 219,806.80 is: 329,710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,521.20 : 684,781.80 = 219,806.80 : x
  2. Step 2: Convert to fraction form
    456,521.20/684,781.80 = 219,806.80/x
  3. Step 3: Cross multiply
    456,521.20x = 684,781.80 × 219,806.80
  4. Step 4: Simplify right side
    456,521.20x = 150,519,696,156.24
  5. Step 5: Solve for x
    x = 150,519,696,156.24/456,521.20
  6. Step 6: Final answer
    x = 329,710.20

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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.