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Finding the Fourth Proportional to 1,330.51, 1,996.80 and 868.17

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Solution

The fourth proportional to 1,330.51, 1,996.80 and 868.17 is: 1,302.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.51 : 1,996.80 = 868.17 : x
  2. Step 2: Convert to fraction form
    1,330.51/1,996.80 = 868.17/x
  3. Step 3: Cross multiply
    1,330.51x = 1,996.80 × 868.17
  4. Step 4: Simplify right side
    1,330.51x = 1,733,561.86
  5. Step 5: Solve for x
    x = 1,733,561.86/1,330.51
  6. Step 6: Final answer
    x = 1,302.93

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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.