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Finding the Fourth Proportional to 743.79, 1,110.24 and 656.22

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Solution

The fourth proportional to 743.79, 1,110.24 and 656.22 is: 979.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.79 : 1,110.24 = 656.22 : x
  2. Step 2: Convert to fraction form
    743.79/1,110.24 = 656.22/x
  3. Step 3: Cross multiply
    743.79x = 1,110.24 × 656.22
  4. Step 4: Simplify right side
    743.79x = 728,561.69
  5. Step 5: Solve for x
    x = 728,561.69/743.79
  6. Step 6: Final answer
    x = 979.53

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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.