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Finding the Fourth Proportional to 839.29, 1,158.17 and 466.25

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Solution

The fourth proportional to 839.29, 1,158.17 and 466.25 is: 643.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.29 : 1,158.17 = 466.25 : x
  2. Step 2: Convert to fraction form
    839.29/1,158.17 = 466.25/x
  3. Step 3: Cross multiply
    839.29x = 1,158.17 × 466.25
  4. Step 4: Simplify right side
    839.29x = 539,994.73
  5. Step 5: Solve for x
    x = 539,994.73/839.29
  6. Step 6: Final answer
    x = 643.39

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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.