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Finding the Fourth Proportional to 589.62, 813.65 and 356.70

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Solution

The fourth proportional to 589.62, 813.65 and 356.70 is: 492.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.62 : 813.65 = 356.70 : x
  2. Step 2: Convert to fraction form
    589.62/813.65 = 356.70/x
  3. Step 3: Cross multiply
    589.62x = 813.65 × 356.70
  4. Step 4: Simplify right side
    589.62x = 290,228.96
  5. Step 5: Solve for x
    x = 290,228.96/589.62
  6. Step 6: Final answer
    x = 492.23

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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.