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Finding the Fourth Proportional to 1,244.42, 1,717.20 and 720.48

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Solution

The fourth proportional to 1,244.42, 1,717.20 and 720.48 is: 994.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.42 : 1,717.20 = 720.48 : x
  2. Step 2: Convert to fraction form
    1,244.42/1,717.20 = 720.48/x
  3. Step 3: Cross multiply
    1,244.42x = 1,717.20 × 720.48
  4. Step 4: Simplify right side
    1,244.42x = 1,237,208.26
  5. Step 5: Solve for x
    x = 1,237,208.26/1,244.42
  6. Step 6: Final answer
    x = 994.20

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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.