Home / 1,126.32-1,551.60-877.20

Finding the Fourth Proportional to 1,126.32, 1,551.60 and 877.20

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Solution

The fourth proportional to 1,126.32, 1,551.60 and 877.20 is: 1,208.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.32 : 1,551.60 = 877.20 : x
  2. Step 2: Convert to fraction form
    1,126.32/1,551.60 = 877.20/x
  3. Step 3: Cross multiply
    1,126.32x = 1,551.60 × 877.20
  4. Step 4: Simplify right side
    1,126.32x = 1,361,063.52
  5. Step 5: Solve for x
    x = 1,361,063.52/1,126.32
  6. Step 6: Final answer
    x = 1,208.42

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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.