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Finding the Fourth Proportional to 486,343.68, 670,625.28 and 316,262.40

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Solution

The fourth proportional to 486,343.68, 670,625.28 and 316,262.40 is: 436,098.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,343.68 : 670,625.28 = 316,262.40 : x
  2. Step 2: Convert to fraction form
    486,343.68/670,625.28 = 316,262.40/x
  3. Step 3: Cross multiply
    486,343.68x = 670,625.28 × 316,262.40
  4. Step 4: Simplify right side
    486,343.68x = 212,093,560,553.47
  5. Step 5: Solve for x
    x = 212,093,560,553.47/486,343.68
  6. Step 6: Final answer
    x = 436,098.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.