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Finding the Fourth Proportional to 1,389.15, 2,084.54 and 567.34

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Solution

The fourth proportional to 1,389.15, 2,084.54 and 567.34 is: 851.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.15 : 2,084.54 = 567.34 : x
  2. Step 2: Convert to fraction form
    1,389.15/2,084.54 = 567.34/x
  3. Step 3: Cross multiply
    1,389.15x = 2,084.54 × 567.34
  4. Step 4: Simplify right side
    1,389.15x = 1,182,634.88
  5. Step 5: Solve for x
    x = 1,182,634.88/1,389.15
  6. Step 6: Final answer
    x = 851.34

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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.