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Finding the Fourth Proportional to 923.16, 1,381.25 and 551.58

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Solution

The fourth proportional to 923.16, 1,381.25 and 551.58 is: 825.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    923.16 : 1,381.25 = 551.58 : x
  2. Step 2: Convert to fraction form
    923.16/1,381.25 = 551.58/x
  3. Step 3: Cross multiply
    923.16x = 1,381.25 × 551.58
  4. Step 4: Simplify right side
    923.16x = 761,867.12
  5. Step 5: Solve for x
    x = 761,867.12/923.16
  6. Step 6: Final answer
    x = 825.28

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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.