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Finding the Fourth Proportional to 589.40, 883.18 and 315.42

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Solution

The fourth proportional to 589.40, 883.18 and 315.42 is: 472.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.40 : 883.18 = 315.42 : x
  2. Step 2: Convert to fraction form
    589.40/883.18 = 315.42/x
  3. Step 3: Cross multiply
    589.40x = 883.18 × 315.42
  4. Step 4: Simplify right side
    589.40x = 278,572.64
  5. Step 5: Solve for x
    x = 278,572.64/589.40
  6. Step 6: Final answer
    x = 472.64

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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.