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Finding the Fourth Proportional to 489,916.32, 676,032.16 and 275,080

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Solution

The fourth proportional to 489,916.32, 676,032.16 and 275,080 is: 379,581.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,916.32 : 676,032.16 = 275,080 : x
  2. Step 2: Convert to fraction form
    489,916.32/676,032.16 = 275,080/x
  3. Step 3: Cross multiply
    489,916.32x = 676,032.16 × 275,080
  4. Step 4: Simplify right side
    489,916.32x = 185,962,926,572.80
  5. Step 5: Solve for x
    x = 185,962,926,572.80/489,916.32
  6. Step 6: Final answer
    x = 379,581.00

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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.