Home / 2,915.28-4,378.50-1,685.16

Finding the Fourth Proportional to 2,915.28, 4,378.50 and 1,685.16

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Solution

The fourth proportional to 2,915.28, 4,378.50 and 1,685.16 is: 2,530.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.28 : 4,378.50 = 1,685.16 : x
  2. Step 2: Convert to fraction form
    2,915.28/4,378.50 = 1,685.16/x
  3. Step 3: Cross multiply
    2,915.28x = 4,378.50 × 1,685.16
  4. Step 4: Simplify right side
    2,915.28x = 7,378,473.06
  5. Step 5: Solve for x
    x = 7,378,473.06/2,915.28
  6. Step 6: Final answer
    x = 2,530.97

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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.