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Finding the Fourth Proportional to 3,487.63, 4,813.17 and 1,915.74

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Solution

The fourth proportional to 3,487.63, 4,813.17 and 1,915.74 is: 2,643.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.63 : 4,813.17 = 1,915.74 : x
  2. Step 2: Convert to fraction form
    3,487.63/4,813.17 = 1,915.74/x
  3. Step 3: Cross multiply
    3,487.63x = 4,813.17 × 1,915.74
  4. Step 4: Simplify right side
    3,487.63x = 9,220,772.72
  5. Step 5: Solve for x
    x = 9,220,772.72/3,487.63
  6. Step 6: Final answer
    x = 2,643.85

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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.