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Finding the Fourth Proportional to 836.83, 1,154.93 and 538.09

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Solution

The fourth proportional to 836.83, 1,154.93 and 538.09 is: 742.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.83 : 1,154.93 = 538.09 : x
  2. Step 2: Convert to fraction form
    836.83/1,154.93 = 538.09/x
  3. Step 3: Cross multiply
    836.83x = 1,154.93 × 538.09
  4. Step 4: Simplify right side
    836.83x = 621,461.74
  5. Step 5: Solve for x
    x = 621,461.74/836.83
  6. Step 6: Final answer
    x = 742.64

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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.