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Finding the Fourth Proportional to 743.16, 1,023.18 and 693.48

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Solution

The fourth proportional to 743.16, 1,023.18 and 693.48 is: 954.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.16 : 1,023.18 = 693.48 : x
  2. Step 2: Convert to fraction form
    743.16/1,023.18 = 693.48/x
  3. Step 3: Cross multiply
    743.16x = 1,023.18 × 693.48
  4. Step 4: Simplify right side
    743.16x = 709,554.87
  5. Step 5: Solve for x
    x = 709,554.87/743.16
  6. Step 6: Final answer
    x = 954.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.