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Finding the Fourth Proportional to 868.41, 1,301.90 and 405.95

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Solution

The fourth proportional to 868.41, 1,301.90 and 405.95 is: 608.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.41 : 1,301.90 = 405.95 : x
  2. Step 2: Convert to fraction form
    868.41/1,301.90 = 405.95/x
  3. Step 3: Cross multiply
    868.41x = 1,301.90 × 405.95
  4. Step 4: Simplify right side
    868.41x = 528,497.77
  5. Step 5: Solve for x
    x = 528,497.77/868.41
  6. Step 6: Final answer
    x = 608.58

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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.