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Finding the Fourth Proportional to 919.10, 1,266.58 and 586.94

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Solution

The fourth proportional to 919.10, 1,266.58 and 586.94 is: 808.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.10 : 1,266.58 = 586.94 : x
  2. Step 2: Convert to fraction form
    919.10/1,266.58 = 586.94/x
  3. Step 3: Cross multiply
    919.10x = 1,266.58 × 586.94
  4. Step 4: Simplify right side
    919.10x = 743,408.16
  5. Step 5: Solve for x
    x = 743,408.16/919.10
  6. Step 6: Final answer
    x = 808.85

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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.