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Finding the Fourth Proportional to 424,478.53, 636,498.69 and 124,920.22

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Solution

The fourth proportional to 424,478.53, 636,498.69 and 124,920.22 is: 187,315.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,478.53 : 636,498.69 = 124,920.22 : x
  2. Step 2: Convert to fraction form
    424,478.53/636,498.69 = 124,920.22/x
  3. Step 3: Cross multiply
    424,478.53x = 636,498.69 × 124,920.22
  4. Step 4: Simplify right side
    424,478.53x = 79,511,556,384.51
  5. Step 5: Solve for x
    x = 79,511,556,384.51/424,478.53
  6. Step 6: Final answer
    x = 187,315.85

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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.