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Finding the Fourth Proportional to 581.13, 801.56 and 493.20

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Solution

The fourth proportional to 581.13, 801.56 and 493.20 is: 680.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.13 : 801.56 = 493.20 : x
  2. Step 2: Convert to fraction form
    581.13/801.56 = 493.20/x
  3. Step 3: Cross multiply
    581.13x = 801.56 × 493.20
  4. Step 4: Simplify right side
    581.13x = 395,330.63
  5. Step 5: Solve for x
    x = 395,330.63/581.13
  6. Step 6: Final answer
    x = 680.28

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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.