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Finding the Fourth Proportional to 3,487.04, 4,812.11 and 1,915.13

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Solution

The fourth proportional to 3,487.04, 4,812.11 and 1,915.13 is: 2,642.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.04 : 4,812.11 = 1,915.13 : x
  2. Step 2: Convert to fraction form
    3,487.04/4,812.11 = 1,915.13/x
  3. Step 3: Cross multiply
    3,487.04x = 4,812.11 × 1,915.13
  4. Step 4: Simplify right side
    3,487.04x = 9,215,782.59
  5. Step 5: Solve for x
    x = 9,215,782.59/3,487.04
  6. Step 6: Final answer
    x = 2,642.87

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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.