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Finding the Fourth Proportional to 1,915.61, 2,873.35 and 617.12

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Solution

The fourth proportional to 1,915.61, 2,873.35 and 617.12 is: 925.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.61 : 2,873.35 = 617.12 : x
  2. Step 2: Convert to fraction form
    1,915.61/2,873.35 = 617.12/x
  3. Step 3: Cross multiply
    1,915.61x = 2,873.35 × 617.12
  4. Step 4: Simplify right side
    1,915.61x = 1,773,184.30
  5. Step 5: Solve for x
    x = 1,773,184.30/1,915.61
  6. Step 6: Final answer
    x = 925.65

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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.