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Finding the Fourth Proportional to 860.63, 1,289.45 and 567.95

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Solution

The fourth proportional to 860.63, 1,289.45 and 567.95 is: 850.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.63 : 1,289.45 = 567.95 : x
  2. Step 2: Convert to fraction form
    860.63/1,289.45 = 567.95/x
  3. Step 3: Cross multiply
    860.63x = 1,289.45 × 567.95
  4. Step 4: Simplify right side
    860.63x = 732,338.10
  5. Step 5: Solve for x
    x = 732,338.10/860.63
  6. Step 6: Final answer
    x = 850.94

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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.