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Finding the Fourth Proportional to 929.31, 1,282.38 and 536.25

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Solution

The fourth proportional to 929.31, 1,282.38 and 536.25 is: 739.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.31 : 1,282.38 = 536.25 : x
  2. Step 2: Convert to fraction form
    929.31/1,282.38 = 536.25/x
  3. Step 3: Cross multiply
    929.31x = 1,282.38 × 536.25
  4. Step 4: Simplify right side
    929.31x = 687,676.28
  5. Step 5: Solve for x
    x = 687,676.28/929.31
  6. Step 6: Final answer
    x = 739.99

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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.