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Finding the Fourth Proportional to 835.31, 1,252.67 and 287.35

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Solution

The fourth proportional to 835.31, 1,252.67 and 287.35 is: 430.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.31 : 1,252.67 = 287.35 : x
  2. Step 2: Convert to fraction form
    835.31/1,252.67 = 287.35/x
  3. Step 3: Cross multiply
    835.31x = 1,252.67 × 287.35
  4. Step 4: Simplify right side
    835.31x = 359,950.16
  5. Step 5: Solve for x
    x = 359,950.16/835.31
  6. Step 6: Final answer
    x = 430.92

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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.