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Finding the Fourth Proportional to 810,672.80, 1,216,009.20 and 219,696.80

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Solution

The fourth proportional to 810,672.80, 1,216,009.20 and 219,696.80 is: 329,545.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,672.80 : 1,216,009.20 = 219,696.80 : x
  2. Step 2: Convert to fraction form
    810,672.80/1,216,009.20 = 219,696.80/x
  3. Step 3: Cross multiply
    810,672.80x = 1,216,009.20 × 219,696.80
  4. Step 4: Simplify right side
    810,672.80x = 267,153,330,010.56
  5. Step 5: Solve for x
    x = 267,153,330,010.56/810,672.80
  6. Step 6: Final answer
    x = 329,545.20

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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.