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Finding the Fourth Proportional to 1,110.11, 1,532.19 and 638.08

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Solution

The fourth proportional to 1,110.11, 1,532.19 and 638.08 is: 880.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.11 : 1,532.19 = 638.08 : x
  2. Step 2: Convert to fraction form
    1,110.11/1,532.19 = 638.08/x
  3. Step 3: Cross multiply
    1,110.11x = 1,532.19 × 638.08
  4. Step 4: Simplify right side
    1,110.11x = 977,659.80
  5. Step 5: Solve for x
    x = 977,659.80/1,110.11
  6. Step 6: Final answer
    x = 880.69

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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.