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Finding the Fourth Proportional to 853.34, 1,177.62 and 521.69

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Solution

The fourth proportional to 853.34, 1,177.62 and 521.69 is: 719.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.34 : 1,177.62 = 521.69 : x
  2. Step 2: Convert to fraction form
    853.34/1,177.62 = 521.69/x
  3. Step 3: Cross multiply
    853.34x = 1,177.62 × 521.69
  4. Step 4: Simplify right side
    853.34x = 614,355.52
  5. Step 5: Solve for x
    x = 614,355.52/853.34
  6. Step 6: Final answer
    x = 719.95

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Double scale
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1.5x scale

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.