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Finding the Fourth Proportional to 456,439.85, 684,696.78 and 156,920.67

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Solution

The fourth proportional to 456,439.85, 684,696.78 and 156,920.67 is: 235,393.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,439.85 : 684,696.78 = 156,920.67 : x
  2. Step 2: Convert to fraction form
    456,439.85/684,696.78 = 156,920.67/x
  3. Step 3: Cross multiply
    456,439.85x = 684,696.78 × 156,920.67
  4. Step 4: Simplify right side
    456,439.85x = 107,443,077,464.44
  5. Step 5: Solve for x
    x = 107,443,077,464.44/456,439.85
  6. Step 6: Final answer
    x = 235,393.73

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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.