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Finding the Fourth Proportional to 744.23, 1,026.60 and 482.40

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Solution

The fourth proportional to 744.23, 1,026.60 and 482.40 is: 665.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.23 : 1,026.60 = 482.40 : x
  2. Step 2: Convert to fraction form
    744.23/1,026.60 = 482.40/x
  3. Step 3: Cross multiply
    744.23x = 1,026.60 × 482.40
  4. Step 4: Simplify right side
    744.23x = 495,231.84
  5. Step 5: Solve for x
    x = 495,231.84/744.23
  6. Step 6: Final answer
    x = 665.43

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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.