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Finding the Fourth Proportional to 934.16, 1,289.72 and 835.74

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Solution

The fourth proportional to 934.16, 1,289.72 and 835.74 is: 1,153.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.16 : 1,289.72 = 835.74 : x
  2. Step 2: Convert to fraction form
    934.16/1,289.72 = 835.74/x
  3. Step 3: Cross multiply
    934.16x = 1,289.72 × 835.74
  4. Step 4: Simplify right side
    934.16x = 1,077,872.68
  5. Step 5: Solve for x
    x = 1,077,872.68/934.16
  6. Step 6: Final answer
    x = 1,153.85

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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.