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Finding the Fourth Proportional to 647.10, 969.69 and 475.26

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Solution

The fourth proportional to 647.10, 969.69 and 475.26 is: 712.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.10 : 969.69 = 475.26 : x
  2. Step 2: Convert to fraction form
    647.10/969.69 = 475.26/x
  3. Step 3: Cross multiply
    647.10x = 969.69 × 475.26
  4. Step 4: Simplify right side
    647.10x = 460,854.87
  5. Step 5: Solve for x
    x = 460,854.87/647.10
  6. Step 6: Final answer
    x = 712.18

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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.