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Finding the Fourth Proportional to 1,389.62, 2,084.43 and 567.71

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Solution

The fourth proportional to 1,389.62, 2,084.43 and 567.71 is: 851.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.62 : 2,084.43 = 567.71 : x
  2. Step 2: Convert to fraction form
    1,389.62/2,084.43 = 567.71/x
  3. Step 3: Cross multiply
    1,389.62x = 2,084.43 × 567.71
  4. Step 4: Simplify right side
    1,389.62x = 1,183,341.33
  5. Step 5: Solve for x
    x = 1,183,341.33/1,389.62
  6. Step 6: Final answer
    x = 851.56

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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.