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Finding the Fourth Proportional to 836.07, 1,152.73 and 678.12

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Solution

The fourth proportional to 836.07, 1,152.73 and 678.12 is: 934.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.07 : 1,152.73 = 678.12 : x
  2. Step 2: Convert to fraction form
    836.07/1,152.73 = 678.12/x
  3. Step 3: Cross multiply
    836.07x = 1,152.73 × 678.12
  4. Step 4: Simplify right side
    836.07x = 781,692.28
  5. Step 5: Solve for x
    x = 781,692.28/836.07
  6. Step 6: Final answer
    x = 934.96

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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.