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Finding the Fourth Proportional to 575.90, 865.17 and 521.90

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Solution

The fourth proportional to 575.90, 865.17 and 521.90 is: 784.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.90 : 865.17 = 521.90 : x
  2. Step 2: Convert to fraction form
    575.90/865.17 = 521.90/x
  3. Step 3: Cross multiply
    575.90x = 865.17 × 521.90
  4. Step 4: Simplify right side
    575.90x = 451,532.22
  5. Step 5: Solve for x
    x = 451,532.22/575.90
  6. Step 6: Final answer
    x = 784.05

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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.