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Finding the Fourth Proportional to 674,862.68, 1,012,549.68 and 405,179.15

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Solution

The fourth proportional to 674,862.68, 1,012,549.68 and 405,179.15 is: 607,922.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,862.68 : 1,012,549.68 = 405,179.15 : x
  2. Step 2: Convert to fraction form
    674,862.68/1,012,549.68 = 405,179.15/x
  3. Step 3: Cross multiply
    674,862.68x = 1,012,549.68 × 405,179.15
  4. Step 4: Simplify right side
    674,862.68x = 410,264,013,612.42
  5. Step 5: Solve for x
    x = 410,264,013,612.42/674,862.68
  6. Step 6: Final answer
    x = 607,922.22

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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.