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Finding the Fourth Proportional to 950.79, 1,311.65 and 619.10

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Solution

The fourth proportional to 950.79, 1,311.65 and 619.10 is: 854.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.79 : 1,311.65 = 619.10 : x
  2. Step 2: Convert to fraction form
    950.79/1,311.65 = 619.10/x
  3. Step 3: Cross multiply
    950.79x = 1,311.65 × 619.10
  4. Step 4: Simplify right side
    950.79x = 812,032.86
  5. Step 5: Solve for x
    x = 812,032.86/950.79
  6. Step 6: Final answer
    x = 854.06

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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.