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Finding the Fourth Proportional to 2,339.64, 3,509.71 and 696.67

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Solution

The fourth proportional to 2,339.64, 3,509.71 and 696.67 is: 1,045.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,339.64 : 3,509.71 = 696.67 : x
  2. Step 2: Convert to fraction form
    2,339.64/3,509.71 = 696.67/x
  3. Step 3: Cross multiply
    2,339.64x = 3,509.71 × 696.67
  4. Step 4: Simplify right side
    2,339.64x = 2,445,099.15
  5. Step 5: Solve for x
    x = 2,445,099.15/2,339.64
  6. Step 6: Final answer
    x = 1,045.07

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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.