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Finding the Fourth Proportional to 839.67, 1,158.74 and 461.56

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Solution

The fourth proportional to 839.67, 1,158.74 and 461.56 is: 636.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.67 : 1,158.74 = 461.56 : x
  2. Step 2: Convert to fraction form
    839.67/1,158.74 = 461.56/x
  3. Step 3: Cross multiply
    839.67x = 1,158.74 × 461.56
  4. Step 4: Simplify right side
    839.67x = 534,826.29
  5. Step 5: Solve for x
    x = 534,826.29/839.67
  6. Step 6: Final answer
    x = 636.95

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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.