Home / 1,512.60-2,087.56-915.28

Finding the Fourth Proportional to 1,512.60, 2,087.56 and 915.28

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Solution

The fourth proportional to 1,512.60, 2,087.56 and 915.28 is: 1,263.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.60 : 2,087.56 = 915.28 : x
  2. Step 2: Convert to fraction form
    1,512.60/2,087.56 = 915.28/x
  3. Step 3: Cross multiply
    1,512.60x = 2,087.56 × 915.28
  4. Step 4: Simplify right side
    1,512.60x = 1,910,701.92
  5. Step 5: Solve for x
    x = 1,910,701.92/1,512.60
  6. Step 6: Final answer
    x = 1,263.19

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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.