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Finding the Fourth Proportional to 1,389.21, 2,084.01 and 567.60

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Solution

The fourth proportional to 1,389.21, 2,084.01 and 567.60 is: 851.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.21 : 2,084.01 = 567.60 : x
  2. Step 2: Convert to fraction form
    1,389.21/2,084.01 = 567.60/x
  3. Step 3: Cross multiply
    1,389.21x = 2,084.01 × 567.60
  4. Step 4: Simplify right side
    1,389.21x = 1,182,884.08
  5. Step 5: Solve for x
    x = 1,182,884.08/1,389.21
  6. Step 6: Final answer
    x = 851.48

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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.