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Finding the Fourth Proportional to 489,891.69, 676,089.59 and 275,045.85

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Solution

The fourth proportional to 489,891.69, 676,089.59 and 275,045.85 is: 379,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,891.69 : 676,089.59 = 275,045.85 : x
  2. Step 2: Convert to fraction form
    489,891.69/676,089.59 = 275,045.85/x
  3. Step 3: Cross multiply
    489,891.69x = 676,089.59 × 275,045.85
  4. Step 4: Simplify right side
    489,891.69x = 185,955,634,582.47
  5. Step 5: Solve for x
    x = 185,955,634,582.47/489,891.69
  6. Step 6: Final answer
    x = 379,585.20

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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.