Home / 1,512.68-2,087.70-1,315.40

Finding the Fourth Proportional to 1,512.68, 2,087.70 and 1,315.40

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Solution

The fourth proportional to 1,512.68, 2,087.70 and 1,315.40 is: 1,815.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.68 : 2,087.70 = 1,315.40 : x
  2. Step 2: Convert to fraction form
    1,512.68/2,087.70 = 1,315.40/x
  3. Step 3: Cross multiply
    1,512.68x = 2,087.70 × 1,315.40
  4. Step 4: Simplify right side
    1,512.68x = 2,746,160.58
  5. Step 5: Solve for x
    x = 2,746,160.58/1,512.68
  6. Step 6: Final answer
    x = 1,815.43

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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.