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Finding the Fourth Proportional to 605,390.80, 908,086.20 and 281,146.24

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Solution

The fourth proportional to 605,390.80, 908,086.20 and 281,146.24 is: 421,719.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,390.80 : 908,086.20 = 281,146.24 : x
  2. Step 2: Convert to fraction form
    605,390.80/908,086.20 = 281,146.24/x
  3. Step 3: Cross multiply
    605,390.80x = 908,086.20 × 281,146.24
  4. Step 4: Simplify right side
    605,390.80x = 255,305,020,725.89
  5. Step 5: Solve for x
    x = 255,305,020,725.89/605,390.80
  6. Step 6: Final answer
    x = 421,719.36

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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.