Home / 1,148.72-1,719.23-841.12

Finding the Fourth Proportional to 1,148.72, 1,719.23 and 841.12

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Solution

The fourth proportional to 1,148.72, 1,719.23 and 841.12 is: 1,258.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.72 : 1,719.23 = 841.12 : x
  2. Step 2: Convert to fraction form
    1,148.72/1,719.23 = 841.12/x
  3. Step 3: Cross multiply
    1,148.72x = 1,719.23 × 841.12
  4. Step 4: Simplify right side
    1,148.72x = 1,446,070.23
  5. Step 5: Solve for x
    x = 1,446,070.23/1,148.72
  6. Step 6: Final answer
    x = 1,258.86

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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.