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Finding the Fourth Proportional to 1,000.85, 1,381.09 and 602.58

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Solution

The fourth proportional to 1,000.85, 1,381.09 and 602.58 is: 831.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.85 : 1,381.09 = 602.58 : x
  2. Step 2: Convert to fraction form
    1,000.85/1,381.09 = 602.58/x
  3. Step 3: Cross multiply
    1,000.85x = 1,381.09 × 602.58
  4. Step 4: Simplify right side
    1,000.85x = 832,214.20
  5. Step 5: Solve for x
    x = 832,214.20/1,000.85
  6. Step 6: Final answer
    x = 831.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.