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Finding the Fourth Proportional to 853.01, 1,176.90 and 521.09

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Solution

The fourth proportional to 853.01, 1,176.90 and 521.09 is: 718.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.01 : 1,176.90 = 521.09 : x
  2. Step 2: Convert to fraction form
    853.01/1,176.90 = 521.09/x
  3. Step 3: Cross multiply
    853.01x = 1,176.90 × 521.09
  4. Step 4: Simplify right side
    853.01x = 613,275.10
  5. Step 5: Solve for x
    x = 613,275.10/853.01
  6. Step 6: Final answer
    x = 718.95

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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.