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Finding the Fourth Proportional to 618.31, 852.96 and 469.34

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Solution

The fourth proportional to 618.31, 852.96 and 469.34 is: 647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.31 : 852.96 = 469.34 : x
  2. Step 2: Convert to fraction form
    618.31/852.96 = 469.34/x
  3. Step 3: Cross multiply
    618.31x = 852.96 × 469.34
  4. Step 4: Simplify right side
    618.31x = 400,328.25
  5. Step 5: Solve for x
    x = 400,328.25/618.31
  6. Step 6: Final answer
    x = 647.46

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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.