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Finding the Fourth Proportional to 870,754, 1,306,131 and 309,790.12

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Solution

The fourth proportional to 870,754, 1,306,131 and 309,790.12 is: 464,685.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,754 : 1,306,131 = 309,790.12 : x
  2. Step 2: Convert to fraction form
    870,754/1,306,131 = 309,790.12/x
  3. Step 3: Cross multiply
    870,754x = 1,306,131 × 309,790.12
  4. Step 4: Simplify right side
    870,754x = 404,626,479,225.72
  5. Step 5: Solve for x
    x = 404,626,479,225.72/870,754
  6. Step 6: Final answer
    x = 464,685.18

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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.