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Finding the Fourth Proportional to 929.57, 1,392.59 and 723.14

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Solution

The fourth proportional to 929.57, 1,392.59 and 723.14 is: 1,083.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.57 : 1,392.59 = 723.14 : x
  2. Step 2: Convert to fraction form
    929.57/1,392.59 = 723.14/x
  3. Step 3: Cross multiply
    929.57x = 1,392.59 × 723.14
  4. Step 4: Simplify right side
    929.57x = 1,007,032.38
  5. Step 5: Solve for x
    x = 1,007,032.38/929.57
  6. Step 6: Final answer
    x = 1,083.34

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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.