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Finding the Fourth Proportional to 868.95, 1,302.60 and 320.98

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Solution

The fourth proportional to 868.95, 1,302.60 and 320.98 is: 481.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.95 : 1,302.60 = 320.98 : x
  2. Step 2: Convert to fraction form
    868.95/1,302.60 = 320.98/x
  3. Step 3: Cross multiply
    868.95x = 1,302.60 × 320.98
  4. Step 4: Simplify right side
    868.95x = 418,108.55
  5. Step 5: Solve for x
    x = 418,108.55/868.95
  6. Step 6: Final answer
    x = 481.17

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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.