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Finding the Fourth Proportional to 381,307.60, 571,961.40 and 100,853.20

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Solution

The fourth proportional to 381,307.60, 571,961.40 and 100,853.20 is: 151,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,307.60 : 571,961.40 = 100,853.20 : x
  2. Step 2: Convert to fraction form
    381,307.60/571,961.40 = 100,853.20/x
  3. Step 3: Cross multiply
    381,307.60x = 571,961.40 × 100,853.20
  4. Step 4: Simplify right side
    381,307.60x = 57,684,137,466.48
  5. Step 5: Solve for x
    x = 57,684,137,466.48/381,307.60
  6. Step 6: Final answer
    x = 151,279.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.