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Finding the Fourth Proportional to 958.56, 1,439.08 and 651.16

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Solution

The fourth proportional to 958.56, 1,439.08 and 651.16 is: 977.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.56 : 1,439.08 = 651.16 : x
  2. Step 2: Convert to fraction form
    958.56/1,439.08 = 651.16/x
  3. Step 3: Cross multiply
    958.56x = 1,439.08 × 651.16
  4. Step 4: Simplify right side
    958.56x = 937,071.33
  5. Step 5: Solve for x
    x = 937,071.33/958.56
  6. Step 6: Final answer
    x = 977.58

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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.