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Finding the Fourth Proportional to 997.47, 1,496.21 and 347.75

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Solution

The fourth proportional to 997.47, 1,496.21 and 347.75 is: 521.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.47 : 1,496.21 = 347.75 : x
  2. Step 2: Convert to fraction form
    997.47/1,496.21 = 347.75/x
  3. Step 3: Cross multiply
    997.47x = 1,496.21 × 347.75
  4. Step 4: Simplify right side
    997.47x = 520,307.03
  5. Step 5: Solve for x
    x = 520,307.03/997.47
  6. Step 6: Final answer
    x = 521.63

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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.