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Finding the Fourth Proportional to 2,915.20, 4,372.80 and 2,893.60

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Solution

The fourth proportional to 2,915.20, 4,372.80 and 2,893.60 is: 4,340.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.20 : 4,372.80 = 2,893.60 : x
  2. Step 2: Convert to fraction form
    2,915.20/4,372.80 = 2,893.60/x
  3. Step 3: Cross multiply
    2,915.20x = 4,372.80 × 2,893.60
  4. Step 4: Simplify right side
    2,915.20x = 12,653,134.08
  5. Step 5: Solve for x
    x = 12,653,134.08/2,915.20
  6. Step 6: Final answer
    x = 4,340.40

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1.5x scale

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.