Home / 1,189.47-1,638.89-1,134.19

Finding the Fourth Proportional to 1,189.47, 1,638.89 and 1,134.19

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Solution

The fourth proportional to 1,189.47, 1,638.89 and 1,134.19 is: 1,562.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.47 : 1,638.89 = 1,134.19 : x
  2. Step 2: Convert to fraction form
    1,189.47/1,638.89 = 1,134.19/x
  3. Step 3: Cross multiply
    1,189.47x = 1,638.89 × 1,134.19
  4. Step 4: Simplify right side
    1,189.47x = 1,858,812.65
  5. Step 5: Solve for x
    x = 1,858,812.65/1,189.47
  6. Step 6: Final answer
    x = 1,562.72

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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.