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Finding the Fourth Proportional to 2,915.76, 4,023.03 and 1,781.14

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Solution

The fourth proportional to 2,915.76, 4,023.03 and 1,781.14 is: 2,457.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.76 : 4,023.03 = 1,781.14 : x
  2. Step 2: Convert to fraction form
    2,915.76/4,023.03 = 1,781.14/x
  3. Step 3: Cross multiply
    2,915.76x = 4,023.03 × 1,781.14
  4. Step 4: Simplify right side
    2,915.76x = 7,165,579.65
  5. Step 5: Solve for x
    x = 7,165,579.65/2,915.76
  6. Step 6: Final answer
    x = 2,457.53

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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.