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Finding the Fourth Proportional to 744.54, 1,122 and 617.40

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Solution

The fourth proportional to 744.54, 1,122 and 617.40 is: 930.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.54 : 1,122 = 617.40 : x
  2. Step 2: Convert to fraction form
    744.54/1,122 = 617.40/x
  3. Step 3: Cross multiply
    744.54x = 1,122 × 617.40
  4. Step 4: Simplify right side
    744.54x = 692,722.80
  5. Step 5: Solve for x
    x = 692,722.80/744.54
  6. Step 6: Final answer
    x = 930.40

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.