Home / 1,021.61-1,531.31-534.71

Finding the Fourth Proportional to 1,021.61, 1,531.31 and 534.71

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Solution

The fourth proportional to 1,021.61, 1,531.31 and 534.71 is: 801.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.61 : 1,531.31 = 534.71 : x
  2. Step 2: Convert to fraction form
    1,021.61/1,531.31 = 534.71/x
  3. Step 3: Cross multiply
    1,021.61x = 1,531.31 × 534.71
  4. Step 4: Simplify right side
    1,021.61x = 818,796.44
  5. Step 5: Solve for x
    x = 818,796.44/1,021.61
  6. Step 6: Final answer
    x = 801.48

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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.