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Finding the Fourth Proportional to 521.87, 719.18 and 374.25

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Solution

The fourth proportional to 521.87, 719.18 and 374.25 is: 515.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.87 : 719.18 = 374.25 : x
  2. Step 2: Convert to fraction form
    521.87/719.18 = 374.25/x
  3. Step 3: Cross multiply
    521.87x = 719.18 × 374.25
  4. Step 4: Simplify right side
    521.87x = 269,151.24
  5. Step 5: Solve for x
    x = 269,151.24/521.87
  6. Step 6: Final answer
    x = 515.75

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.