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Finding the Fourth Proportional to 1,585.43, 2,187.91 and 922.67

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Solution

The fourth proportional to 1,585.43, 2,187.91 and 922.67 is: 1,273.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,585.43 : 2,187.91 = 922.67 : x
  2. Step 2: Convert to fraction form
    1,585.43/2,187.91 = 922.67/x
  3. Step 3: Cross multiply
    1,585.43x = 2,187.91 × 922.67
  4. Step 4: Simplify right side
    1,585.43x = 2,018,718.11
  5. Step 5: Solve for x
    x = 2,018,718.11/1,585.43
  6. Step 6: Final answer
    x = 1,273.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.