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Finding the Fourth Proportional to 1,241.16, 1,859.33 and 691.67

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Solution

The fourth proportional to 1,241.16, 1,859.33 and 691.67 is: 1,036.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.16 : 1,859.33 = 691.67 : x
  2. Step 2: Convert to fraction form
    1,241.16/1,859.33 = 691.67/x
  3. Step 3: Cross multiply
    1,241.16x = 1,859.33 × 691.67
  4. Step 4: Simplify right side
    1,241.16x = 1,286,030.03
  5. Step 5: Solve for x
    x = 1,286,030.03/1,241.16
  6. Step 6: Final answer
    x = 1,036.15

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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.