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Finding the Fourth Proportional to 1,389.30, 2,083.95 and 567.69

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Solution

The fourth proportional to 1,389.30, 2,083.95 and 567.69 is: 851.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,389.30 : 2,083.95 = 567.69 : x
  2. Step 2: Convert to fraction form
    1,389.30/2,083.95 = 567.69/x
  3. Step 3: Cross multiply
    1,389.30x = 2,083.95 × 567.69
  4. Step 4: Simplify right side
    1,389.30x = 1,183,037.58
  5. Step 5: Solve for x
    x = 1,183,037.58/1,389.30
  6. Step 6: Final answer
    x = 851.54

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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.