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Finding the Fourth Proportional to 743.52, 1,109.47 and 665.63

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Solution

The fourth proportional to 743.52, 1,109.47 and 665.63 is: 993.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.52 : 1,109.47 = 665.63 : x
  2. Step 2: Convert to fraction form
    743.52/1,109.47 = 665.63/x
  3. Step 3: Cross multiply
    743.52x = 1,109.47 × 665.63
  4. Step 4: Simplify right side
    743.52x = 738,489.30
  5. Step 5: Solve for x
    x = 738,489.30/743.52
  6. Step 6: Final answer
    x = 993.23

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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.