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Finding the Fourth Proportional to 744.89, 1,117.11 and 515.26

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Solution

The fourth proportional to 744.89, 1,117.11 and 515.26 is: 772.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    744.89 : 1,117.11 = 515.26 : x
  2. Step 2: Convert to fraction form
    744.89/1,117.11 = 515.26/x
  3. Step 3: Cross multiply
    744.89x = 1,117.11 × 515.26
  4. Step 4: Simplify right side
    744.89x = 575,602.10
  5. Step 5: Solve for x
    x = 575,602.10/744.89
  6. Step 6: Final answer
    x = 772.73

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Double scale
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1.5x scale

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.