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Finding the Fourth Proportional to 595.20, 821.43 and 385.48

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Solution

The fourth proportional to 595.20, 821.43 and 385.48 is: 531.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    595.20 : 821.43 = 385.48 : x
  2. Step 2: Convert to fraction form
    595.20/821.43 = 385.48/x
  3. Step 3: Cross multiply
    595.20x = 821.43 × 385.48
  4. Step 4: Simplify right side
    595.20x = 316,642.78
  5. Step 5: Solve for x
    x = 316,642.78/595.20
  6. Step 6: Final answer
    x = 531.99

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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.