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Finding the Fourth Proportional to 970.11, 1,332.99 and 859.41

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Solution

The fourth proportional to 970.11, 1,332.99 and 859.41 is: 1,180.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    970.11 : 1,332.99 = 859.41 : x
  2. Step 2: Convert to fraction form
    970.11/1,332.99 = 859.41/x
  3. Step 3: Cross multiply
    970.11x = 1,332.99 × 859.41
  4. Step 4: Simplify right side
    970.11x = 1,145,584.94
  5. Step 5: Solve for x
    x = 1,145,584.94/970.11
  6. Step 6: Final answer
    x = 1,180.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.