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Finding the Fourth Proportional to 618.14, 852.18 and 486.92

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Solution

The fourth proportional to 618.14, 852.18 and 486.92 is: 671.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.14 : 852.18 = 486.92 : x
  2. Step 2: Convert to fraction form
    618.14/852.18 = 486.92/x
  3. Step 3: Cross multiply
    618.14x = 852.18 × 486.92
  4. Step 4: Simplify right side
    618.14x = 414,943.49
  5. Step 5: Solve for x
    x = 414,943.49/618.14
  6. Step 6: Final answer
    x = 671.28

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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.