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Finding the Fourth Proportional to 1,253.71, 1,880.57 and 993.43

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Solution

The fourth proportional to 1,253.71, 1,880.57 and 993.43 is: 1,490.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.71 : 1,880.57 = 993.43 : x
  2. Step 2: Convert to fraction form
    1,253.71/1,880.57 = 993.43/x
  3. Step 3: Cross multiply
    1,253.71x = 1,880.57 × 993.43
  4. Step 4: Simplify right side
    1,253.71x = 1,868,214.66
  5. Step 5: Solve for x
    x = 1,868,214.66/1,253.71
  6. Step 6: Final answer
    x = 1,490.15

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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.