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Finding the Fourth Proportional to 587.43, 810.98 and 401.20

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Solution

The fourth proportional to 587.43, 810.98 and 401.20 is: 553.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.43 : 810.98 = 401.20 : x
  2. Step 2: Convert to fraction form
    587.43/810.98 = 401.20/x
  3. Step 3: Cross multiply
    587.43x = 810.98 × 401.20
  4. Step 4: Simplify right side
    587.43x = 325,365.18
  5. Step 5: Solve for x
    x = 325,365.18/587.43
  6. Step 6: Final answer
    x = 553.88

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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.