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Finding the Fourth Proportional to 636.76, 876.67 and 439.93

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Solution

The fourth proportional to 636.76, 876.67 and 439.93 is: 605.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.76 : 876.67 = 439.93 : x
  2. Step 2: Convert to fraction form
    636.76/876.67 = 439.93/x
  3. Step 3: Cross multiply
    636.76x = 876.67 × 439.93
  4. Step 4: Simplify right side
    636.76x = 385,675.90
  5. Step 5: Solve for x
    x = 385,675.90/636.76
  6. Step 6: Final answer
    x = 605.68

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1.5x scale

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.