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Finding the Fourth Proportional to 870,728.34, 1,306,046.40 and 271,620.90

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Solution

The fourth proportional to 870,728.34, 1,306,046.40 and 271,620.90 is: 407,416.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,728.34 : 1,306,046.40 = 271,620.90 : x
  2. Step 2: Convert to fraction form
    870,728.34/1,306,046.40 = 271,620.90/x
  3. Step 3: Cross multiply
    870,728.34x = 1,306,046.40 × 271,620.90
  4. Step 4: Simplify right side
    870,728.34x = 354,749,498,609.76
  5. Step 5: Solve for x
    x = 354,749,498,609.76/870,728.34
  6. Step 6: Final answer
    x = 407,416.97

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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.