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Finding the Fourth Proportional to 925.84, 1,388.66 and 309.47

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Solution

The fourth proportional to 925.84, 1,388.66 and 309.47 is: 464.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.84 : 1,388.66 = 309.47 : x
  2. Step 2: Convert to fraction form
    925.84/1,388.66 = 309.47/x
  3. Step 3: Cross multiply
    925.84x = 1,388.66 × 309.47
  4. Step 4: Simplify right side
    925.84x = 429,747.93
  5. Step 5: Solve for x
    x = 429,747.93/925.84
  6. Step 6: Final answer
    x = 464.17

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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.