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Finding the Fourth Proportional to 950.79, 1,426.42 and 561.11

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Solution

The fourth proportional to 950.79, 1,426.42 and 561.11 is: 841.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.79 : 1,426.42 = 561.11 : x
  2. Step 2: Convert to fraction form
    950.79/1,426.42 = 561.11/x
  3. Step 3: Cross multiply
    950.79x = 1,426.42 × 561.11
  4. Step 4: Simplify right side
    950.79x = 800,378.53
  5. Step 5: Solve for x
    x = 800,378.53/950.79
  6. Step 6: Final answer
    x = 841.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.