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Finding the Fourth Proportional to 847.26, 1,168.29 and 637.74

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Solution

The fourth proportional to 847.26, 1,168.29 and 637.74 is: 879.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.26 : 1,168.29 = 637.74 : x
  2. Step 2: Convert to fraction form
    847.26/1,168.29 = 637.74/x
  3. Step 3: Cross multiply
    847.26x = 1,168.29 × 637.74
  4. Step 4: Simplify right side
    847.26x = 745,065.26
  5. Step 5: Solve for x
    x = 745,065.26/847.26
  6. Step 6: Final answer
    x = 879.38

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1.5x scale

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.