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Finding the Fourth Proportional to 1,254.40, 1,880.16 and 523.60

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Solution

The fourth proportional to 1,254.40, 1,880.16 and 523.60 is: 784.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.40 : 1,880.16 = 523.60 : x
  2. Step 2: Convert to fraction form
    1,254.40/1,880.16 = 523.60/x
  3. Step 3: Cross multiply
    1,254.40x = 1,880.16 × 523.60
  4. Step 4: Simplify right side
    1,254.40x = 984,451.78
  5. Step 5: Solve for x
    x = 984,451.78/1,254.40
  6. Step 6: Final answer
    x = 784.80

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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.