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Finding the Fourth Proportional to 927.29, 1,389.42 and 556.35

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Solution

The fourth proportional to 927.29, 1,389.42 and 556.35 is: 833.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.29 : 1,389.42 = 556.35 : x
  2. Step 2: Convert to fraction form
    927.29/1,389.42 = 556.35/x
  3. Step 3: Cross multiply
    927.29x = 1,389.42 × 556.35
  4. Step 4: Simplify right side
    927.29x = 773,003.82
  5. Step 5: Solve for x
    x = 773,003.82/927.29
  6. Step 6: Final answer
    x = 833.62

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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.