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Finding the Fourth Proportional to 923.63, 1,385.13 and 265.34

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Solution

The fourth proportional to 923.63, 1,385.13 and 265.34 is: 397.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.63 : 1,385.13 = 265.34 : x
  2. Step 2: Convert to fraction form
    923.63/1,385.13 = 265.34/x
  3. Step 3: Cross multiply
    923.63x = 1,385.13 × 265.34
  4. Step 4: Simplify right side
    923.63x = 367,524.46
  5. Step 5: Solve for x
    x = 367,524.46/923.63
  6. Step 6: Final answer
    x = 397.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.