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Finding the Fourth Proportional to 970.36, 1,339 and 571.95

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Solution

The fourth proportional to 970.36, 1,339 and 571.95 is: 789.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.36 : 1,339 = 571.95 : x
  2. Step 2: Convert to fraction form
    970.36/1,339 = 571.95/x
  3. Step 3: Cross multiply
    970.36x = 1,339 × 571.95
  4. Step 4: Simplify right side
    970.36x = 765,841.05
  5. Step 5: Solve for x
    x = 765,841.05/970.36
  6. Step 6: Final answer
    x = 789.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.