Home / 1,335.12-1,841.16-1,189.20

Finding the Fourth Proportional to 1,335.12, 1,841.16 and 1,189.20

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Solution

The fourth proportional to 1,335.12, 1,841.16 and 1,189.20 is: 1,639.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,335.12 : 1,841.16 = 1,189.20 : x
  2. Step 2: Convert to fraction form
    1,335.12/1,841.16 = 1,189.20/x
  3. Step 3: Cross multiply
    1,335.12x = 1,841.16 × 1,189.20
  4. Step 4: Simplify right side
    1,335.12x = 2,189,507.47
  5. Step 5: Solve for x
    x = 2,189,507.47/1,335.12
  6. Step 6: Final answer
    x = 1,639.93

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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.