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Finding the Fourth Proportional to 812,065.60, 1,120,641.60 and 449,489.92

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Solution

The fourth proportional to 812,065.60, 1,120,641.60 and 449,489.92 is: 620,291.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,065.60 : 1,120,641.60 = 449,489.92 : x
  2. Step 2: Convert to fraction form
    812,065.60/1,120,641.60 = 449,489.92/x
  3. Step 3: Cross multiply
    812,065.60x = 1,120,641.60 × 449,489.92
  4. Step 4: Simplify right side
    812,065.60x = 503,717,103,132.67
  5. Step 5: Solve for x
    x = 503,717,103,132.67/812,065.60
  6. Step 6: Final answer
    x = 620,291.15

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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.