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Finding the Fourth Proportional to 3,407.80, 4,702.82 and 1,915.71

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Solution

The fourth proportional to 3,407.80, 4,702.82 and 1,915.71 is: 2,643.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,407.80 : 4,702.82 = 1,915.71 : x
  2. Step 2: Convert to fraction form
    3,407.80/4,702.82 = 1,915.71/x
  3. Step 3: Cross multiply
    3,407.80x = 4,702.82 × 1,915.71
  4. Step 4: Simplify right side
    3,407.80x = 9,009,229.72
  5. Step 5: Solve for x
    x = 9,009,229.72/3,407.80
  6. Step 6: Final answer
    x = 2,643.71

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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.