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Finding the Fourth Proportional to 489,691.55, 675,775.65 and 271,900.63

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Solution

The fourth proportional to 489,691.55, 675,775.65 and 271,900.63 is: 375,223.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,691.55 : 675,775.65 = 271,900.63 : x
  2. Step 2: Convert to fraction form
    489,691.55/675,775.65 = 271,900.63/x
  3. Step 3: Cross multiply
    489,691.55x = 675,775.65 × 271,900.63
  4. Step 4: Simplify right side
    489,691.55x = 183,743,826,442.32
  5. Step 5: Solve for x
    x = 183,743,826,442.32/489,691.55
  6. Step 6: Final answer
    x = 375,223.60

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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.