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Finding the Fourth Proportional to 958.98, 1,315.25 and 919.29

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Solution

The fourth proportional to 958.98, 1,315.25 and 919.29 is: 1,260.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.98 : 1,315.25 = 919.29 : x
  2. Step 2: Convert to fraction form
    958.98/1,315.25 = 919.29/x
  3. Step 3: Cross multiply
    958.98x = 1,315.25 × 919.29
  4. Step 4: Simplify right side
    958.98x = 1,209,098.47
  5. Step 5: Solve for x
    x = 1,209,098.47/958.98
  6. Step 6: Final answer
    x = 1,260.82

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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.