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Finding the Fourth Proportional to 593.74, 890.20 and 398.80

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Solution

The fourth proportional to 593.74, 890.20 and 398.80 is: 597.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    593.74 : 890.20 = 398.80 : x
  2. Step 2: Convert to fraction form
    593.74/890.20 = 398.80/x
  3. Step 3: Cross multiply
    593.74x = 890.20 × 398.80
  4. Step 4: Simplify right side
    593.74x = 355,011.76
  5. Step 5: Solve for x
    x = 355,011.76/593.74
  6. Step 6: Final answer
    x = 597.92

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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.