Home / 1,126.15-1,554.08-628.79

Finding the Fourth Proportional to 1,126.15, 1,554.08 and 628.79

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Solution

The fourth proportional to 1,126.15, 1,554.08 and 628.79 is: 867.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.15 : 1,554.08 = 628.79 : x
  2. Step 2: Convert to fraction form
    1,126.15/1,554.08 = 628.79/x
  3. Step 3: Cross multiply
    1,126.15x = 1,554.08 × 628.79
  4. Step 4: Simplify right side
    1,126.15x = 977,182.19
  5. Step 5: Solve for x
    x = 977,182.19/1,126.15
  6. Step 6: Final answer
    x = 867.72

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Double scale
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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.