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Finding the Fourth Proportional to 839.43, 1,258.58 and 376.57

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Solution

The fourth proportional to 839.43, 1,258.58 and 376.57 is: 564.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.43 : 1,258.58 = 376.57 : x
  2. Step 2: Convert to fraction form
    839.43/1,258.58 = 376.57/x
  3. Step 3: Cross multiply
    839.43x = 1,258.58 × 376.57
  4. Step 4: Simplify right side
    839.43x = 473,943.47
  5. Step 5: Solve for x
    x = 473,943.47/839.43
  6. Step 6: Final answer
    x = 564.60

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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.