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Finding the Fourth Proportional to 612,141.15, 918,211.73 and 425,517.15

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Solution

The fourth proportional to 612,141.15, 918,211.73 and 425,517.15 is: 638,275.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,141.15 : 918,211.73 = 425,517.15 : x
  2. Step 2: Convert to fraction form
    612,141.15/918,211.73 = 425,517.15/x
  3. Step 3: Cross multiply
    612,141.15x = 918,211.73 × 425,517.15
  4. Step 4: Simplify right side
    612,141.15x = 390,714,836,318.58
  5. Step 5: Solve for x
    x = 390,714,836,318.58/612,141.15
  6. Step 6: Final answer
    x = 638,275.73

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.