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Finding the Fourth Proportional to 833.48, 1,248.67 and 521.23

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Solution

The fourth proportional to 833.48, 1,248.67 and 521.23 is: 780.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.48 : 1,248.67 = 521.23 : x
  2. Step 2: Convert to fraction form
    833.48/1,248.67 = 521.23/x
  3. Step 3: Cross multiply
    833.48x = 1,248.67 × 521.23
  4. Step 4: Simplify right side
    833.48x = 650,841.79
  5. Step 5: Solve for x
    x = 650,841.79/833.48
  6. Step 6: Final answer
    x = 780.87

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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.