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Finding the Fourth Proportional to 919.24, 1,372.49 and 910

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Solution

The fourth proportional to 919.24, 1,372.49 and 910 is: 1,358.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.24 : 1,372.49 = 910 : x
  2. Step 2: Convert to fraction form
    919.24/1,372.49 = 910/x
  3. Step 3: Cross multiply
    919.24x = 1,372.49 × 910
  4. Step 4: Simplify right side
    919.24x = 1,248,965.90
  5. Step 5: Solve for x
    x = 1,248,965.90/919.24
  6. Step 6: Final answer
    x = 1,358.69

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.