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Finding the Fourth Proportional to 1,244.45, 1,717.06 and 720.18

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Solution

The fourth proportional to 1,244.45, 1,717.06 and 720.18 is: 993.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.45 : 1,717.06 = 720.18 : x
  2. Step 2: Convert to fraction form
    1,244.45/1,717.06 = 720.18/x
  3. Step 3: Cross multiply
    1,244.45x = 1,717.06 × 720.18
  4. Step 4: Simplify right side
    1,244.45x = 1,236,592.27
  5. Step 5: Solve for x
    x = 1,236,592.27/1,244.45
  6. Step 6: Final answer
    x = 993.69

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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.