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Finding the Fourth Proportional to 836.39, 1,155.08 and 706.43

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Solution

The fourth proportional to 836.39, 1,155.08 and 706.43 is: 975.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.39 : 1,155.08 = 706.43 : x
  2. Step 2: Convert to fraction form
    836.39/1,155.08 = 706.43/x
  3. Step 3: Cross multiply
    836.39x = 1,155.08 × 706.43
  4. Step 4: Simplify right side
    836.39x = 815,979.63
  5. Step 5: Solve for x
    x = 815,979.63/836.39
  6. Step 6: Final answer
    x = 975.60

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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.