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Finding the Fourth Proportional to 868.87, 1,303.30 and 291.74

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Solution

The fourth proportional to 868.87, 1,303.30 and 291.74 is: 437.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.87 : 1,303.30 = 291.74 : x
  2. Step 2: Convert to fraction form
    868.87/1,303.30 = 291.74/x
  3. Step 3: Cross multiply
    868.87x = 1,303.30 × 291.74
  4. Step 4: Simplify right side
    868.87x = 380,224.74
  5. Step 5: Solve for x
    x = 380,224.74/868.87
  6. Step 6: Final answer
    x = 437.61

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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.