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Finding the Fourth Proportional to 870,687.12, 1,306,037.16 and 239,635.68

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Solution

The fourth proportional to 870,687.12, 1,306,037.16 and 239,635.68 is: 359,455.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,687.12 : 1,306,037.16 = 239,635.68 : x
  2. Step 2: Convert to fraction form
    870,687.12/1,306,037.16 = 239,635.68/x
  3. Step 3: Cross multiply
    870,687.12x = 1,306,037.16 × 239,635.68
  4. Step 4: Simplify right side
    870,687.12x = 312,973,102,941.87
  5. Step 5: Solve for x
    x = 312,973,102,941.87/870,687.12
  6. Step 6: Final answer
    x = 359,455.30

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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.