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Finding the Fourth Proportional to 853.00, 1,279.53 and 487.62

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Solution

The fourth proportional to 853.00, 1,279.53 and 487.62 is: 731.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.00 : 1,279.53 = 487.62 : x
  2. Step 2: Convert to fraction form
    853.00/1,279.53 = 487.62/x
  3. Step 3: Cross multiply
    853.00x = 1,279.53 × 487.62
  4. Step 4: Simplify right side
    853.00x = 623,924.42
  5. Step 5: Solve for x
    x = 623,924.42/853.00
  6. Step 6: Final answer
    x = 731.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.