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Finding the Fourth Proportional to 489,915.52, 676,066.05 and 275,064.64

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Solution

The fourth proportional to 489,915.52, 676,066.05 and 275,064.64 is: 379,579.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,915.52 : 676,066.05 = 275,064.64 : x
  2. Step 2: Convert to fraction form
    489,915.52/676,066.05 = 275,064.64/x
  3. Step 3: Cross multiply
    489,915.52x = 676,066.05 × 275,064.64
  4. Step 4: Simplify right side
    489,915.52x = 185,961,862,969.31
  5. Step 5: Solve for x
    x = 185,961,862,969.31/489,915.52
  6. Step 6: Final answer
    x = 379,579.45

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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.