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Finding the Fourth Proportional to 1,915.60, 2,873.39 and 617.17

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Solution

The fourth proportional to 1,915.60, 2,873.39 and 617.17 is: 925.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.60 : 2,873.39 = 617.17 : x
  2. Step 2: Convert to fraction form
    1,915.60/2,873.39 = 617.17/x
  3. Step 3: Cross multiply
    1,915.60x = 2,873.39 × 617.17
  4. Step 4: Simplify right side
    1,915.60x = 1,773,370.11
  5. Step 5: Solve for x
    x = 1,773,370.11/1,915.60
  6. Step 6: Final answer
    x = 925.75

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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.