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Finding the Fourth Proportional to 489,026.88, 674,951.40 and 318,965.76

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Solution

The fourth proportional to 489,026.88, 674,951.40 and 318,965.76 is: 440,234.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,026.88 : 674,951.40 = 318,965.76 : x
  2. Step 2: Convert to fraction form
    489,026.88/674,951.40 = 318,965.76/x
  3. Step 3: Cross multiply
    489,026.88x = 674,951.40 × 318,965.76
  4. Step 4: Simplify right side
    489,026.88x = 215,286,386,264.06
  5. Step 5: Solve for x
    x = 215,286,386,264.06/489,026.88
  6. Step 6: Final answer
    x = 440,234.26

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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.