Home / 1,113.12-1,669.68-1,100.40

Finding the Fourth Proportional to 1,113.12, 1,669.68 and 1,100.40

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Solution

The fourth proportional to 1,113.12, 1,669.68 and 1,100.40 is: 1,650.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.12 : 1,669.68 = 1,100.40 : x
  2. Step 2: Convert to fraction form
    1,113.12/1,669.68 = 1,100.40/x
  3. Step 3: Cross multiply
    1,113.12x = 1,669.68 × 1,100.40
  4. Step 4: Simplify right side
    1,113.12x = 1,837,315.87
  5. Step 5: Solve for x
    x = 1,837,315.87/1,113.12
  6. Step 6: Final answer
    x = 1,650.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.