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Finding the Fourth Proportional to 1,915.47, 2,873.10 and 616.83

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Solution

The fourth proportional to 1,915.47, 2,873.10 and 616.83 is: 925.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.47 : 2,873.10 = 616.83 : x
  2. Step 2: Convert to fraction form
    1,915.47/2,873.10 = 616.83/x
  3. Step 3: Cross multiply
    1,915.47x = 2,873.10 × 616.83
  4. Step 4: Simplify right side
    1,915.47x = 1,772,214.27
  5. Step 5: Solve for x
    x = 1,772,214.27/1,915.47
  6. Step 6: Final answer
    x = 925.21

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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.