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Finding the Fourth Proportional to 839.74, 1,158.79 and 466.71

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Solution

The fourth proportional to 839.74, 1,158.79 and 466.71 is: 644.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.74 : 1,158.79 = 466.71 : x
  2. Step 2: Convert to fraction form
    839.74/1,158.79 = 466.71/x
  3. Step 3: Cross multiply
    839.74x = 1,158.79 × 466.71
  4. Step 4: Simplify right side
    839.74x = 540,815.87
  5. Step 5: Solve for x
    x = 540,815.87/839.74
  6. Step 6: Final answer
    x = 644.03

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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.