Home / 691.03-1,036.70-258.19

Finding the Fourth Proportional to 691.03, 1,036.70 and 258.19

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Solution

The fourth proportional to 691.03, 1,036.70 and 258.19 is: 387.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.03 : 1,036.70 = 258.19 : x
  2. Step 2: Convert to fraction form
    691.03/1,036.70 = 258.19/x
  3. Step 3: Cross multiply
    691.03x = 1,036.70 × 258.19
  4. Step 4: Simplify right side
    691.03x = 267,662.66
  5. Step 5: Solve for x
    x = 267,662.66/691.03
  6. Step 6: Final answer
    x = 387.34

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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.