Home / 1,125.36-1,554.12-1,123.20

Finding the Fourth Proportional to 1,125.36, 1,554.12 and 1,123.20

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Solution

The fourth proportional to 1,125.36, 1,554.12 and 1,123.20 is: 1,551.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.36 : 1,554.12 = 1,123.20 : x
  2. Step 2: Convert to fraction form
    1,125.36/1,554.12 = 1,123.20/x
  3. Step 3: Cross multiply
    1,125.36x = 1,554.12 × 1,123.20
  4. Step 4: Simplify right side
    1,125.36x = 1,745,587.58
  5. Step 5: Solve for x
    x = 1,745,587.58/1,125.36
  6. Step 6: Final answer
    x = 1,551.14

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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.