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Finding the Fourth Proportional to 891,427, 1,230,149.44 and 504,191.20

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Solution

The fourth proportional to 891,427, 1,230,149.44 and 504,191.20 is: 695,772.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,427 : 1,230,149.44 = 504,191.20 : x
  2. Step 2: Convert to fraction form
    891,427/1,230,149.44 = 504,191.20/x
  3. Step 3: Cross multiply
    891,427x = 1,230,149.44 × 504,191.20
  4. Step 4: Simplify right side
    891,427x = 620,230,522,332.93
  5. Step 5: Solve for x
    x = 620,230,522,332.93/891,427
  6. Step 6: Final answer
    x = 695,772.65

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.