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Finding the Fourth Proportional to 950.42, 1,311.57 and 530.78

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Solution

The fourth proportional to 950.42, 1,311.57 and 530.78 is: 732.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.42 : 1,311.57 = 530.78 : x
  2. Step 2: Convert to fraction form
    950.42/1,311.57 = 530.78/x
  3. Step 3: Cross multiply
    950.42x = 1,311.57 × 530.78
  4. Step 4: Simplify right side
    950.42x = 696,155.94
  5. Step 5: Solve for x
    x = 696,155.94/950.42
  6. Step 6: Final answer
    x = 732.47

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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.