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Finding the Fourth Proportional to 593.40, 890.55 and 387.91

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Solution

The fourth proportional to 593.40, 890.55 and 387.91 is: 582.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    593.40 : 890.55 = 387.91 : x
  2. Step 2: Convert to fraction form
    593.40/890.55 = 387.91/x
  3. Step 3: Cross multiply
    593.40x = 890.55 × 387.91
  4. Step 4: Simplify right side
    593.40x = 345,453.25
  5. Step 5: Solve for x
    x = 345,453.25/593.40
  6. Step 6: Final answer
    x = 582.16

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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.