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Finding the Fourth Proportional to 489,915, 676,030.86 and 275,079.24

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Solution

The fourth proportional to 489,915, 676,030.86 and 275,079.24 is: 379,580.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,915 : 676,030.86 = 275,079.24 : x
  2. Step 2: Convert to fraction form
    489,915/676,030.86 = 275,079.24/x
  3. Step 3: Cross multiply
    489,915x = 676,030.86 × 275,079.24
  4. Step 4: Simplify right side
    489,915x = 185,962,055,185.35
  5. Step 5: Solve for x
    x = 185,962,055,185.35/489,915
  6. Step 6: Final answer
    x = 379,580.24

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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.