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Finding the Fourth Proportional to 923.64, 1,275 and 768.12

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Solution

The fourth proportional to 923.64, 1,275 and 768.12 is: 1,060.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.64 : 1,275 = 768.12 : x
  2. Step 2: Convert to fraction form
    923.64/1,275 = 768.12/x
  3. Step 3: Cross multiply
    923.64x = 1,275 × 768.12
  4. Step 4: Simplify right side
    923.64x = 979,353
  5. Step 5: Solve for x
    x = 979,353/923.64
  6. Step 6: Final answer
    x = 1,060.32

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1.5x scale

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.