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Finding the Fourth Proportional to 494,139.62, 681,894.78 and 279,275.24

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Solution

The fourth proportional to 494,139.62, 681,894.78 and 279,275.24 is: 385,389.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,139.62 : 681,894.78 = 279,275.24 : x
  2. Step 2: Convert to fraction form
    494,139.62/681,894.78 = 279,275.24/x
  3. Step 3: Cross multiply
    494,139.62x = 681,894.78 × 279,275.24
  4. Step 4: Simplify right side
    494,139.62x = 190,436,328,339.25
  5. Step 5: Solve for x
    x = 190,436,328,339.25/494,139.62
  6. Step 6: Final answer
    x = 385,389.72

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1.5x scale

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.