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Finding the Fourth Proportional to 489,963.66, 676,168.80 and 272,188.82

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Solution

The fourth proportional to 489,963.66, 676,168.80 and 272,188.82 is: 375,631.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,963.66 : 676,168.80 = 272,188.82 : x
  2. Step 2: Convert to fraction form
    489,963.66/676,168.80 = 272,188.82/x
  3. Step 3: Cross multiply
    489,963.66x = 676,168.80 × 272,188.82
  4. Step 4: Simplify right side
    489,963.66x = 184,045,587,792.82
  5. Step 5: Solve for x
    x = 184,045,587,792.82/489,963.66
  6. Step 6: Final answer
    x = 375,631.10

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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.