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Finding the Fourth Proportional to 741.78, 1,105.75 and 730.52

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Solution

The fourth proportional to 741.78, 1,105.75 and 730.52 is: 1,088.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.78 : 1,105.75 = 730.52 : x
  2. Step 2: Convert to fraction form
    741.78/1,105.75 = 730.52/x
  3. Step 3: Cross multiply
    741.78x = 1,105.75 × 730.52
  4. Step 4: Simplify right side
    741.78x = 807,772.02
  5. Step 5: Solve for x
    x = 807,772.02/741.78
  6. Step 6: Final answer
    x = 1,088.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.