Home / 1,110.24-1,532.05-638.11

Finding the Fourth Proportional to 1,110.24, 1,532.05 and 638.11

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Solution

The fourth proportional to 1,110.24, 1,532.05 and 638.11 is: 880.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.24 : 1,532.05 = 638.11 : x
  2. Step 2: Convert to fraction form
    1,110.24/1,532.05 = 638.11/x
  3. Step 3: Cross multiply
    1,110.24x = 1,532.05 × 638.11
  4. Step 4: Simplify right side
    1,110.24x = 977,616.75
  5. Step 5: Solve for x
    x = 977,616.75/1,110.24
  6. Step 6: Final answer
    x = 880.55

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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.