Home / 1,512.45-2,087.28-1,291.32

Finding the Fourth Proportional to 1,512.45, 2,087.28 and 1,291.32

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Solution

The fourth proportional to 1,512.45, 2,087.28 and 1,291.32 is: 1,782.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,512.45 : 2,087.28 = 1,291.32 : x
  2. Step 2: Convert to fraction form
    1,512.45/2,087.28 = 1,291.32/x
  3. Step 3: Cross multiply
    1,512.45x = 2,087.28 × 1,291.32
  4. Step 4: Simplify right side
    1,512.45x = 2,695,346.41
  5. Step 5: Solve for x
    x = 2,695,346.41/1,512.45
  6. Step 6: Final answer
    x = 1,782.11

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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.