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Finding the Fourth Proportional to 835.07, 1,252.74 and 287.12

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Solution

The fourth proportional to 835.07, 1,252.74 and 287.12 is: 430.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.07 : 1,252.74 = 287.12 : x
  2. Step 2: Convert to fraction form
    835.07/1,252.74 = 287.12/x
  3. Step 3: Cross multiply
    835.07x = 1,252.74 × 287.12
  4. Step 4: Simplify right side
    835.07x = 359,680.45
  5. Step 5: Solve for x
    x = 359,680.45/835.07
  6. Step 6: Final answer
    x = 430.72

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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.