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Finding the Fourth Proportional to 618.35, 926.84 and 545.30

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Solution

The fourth proportional to 618.35, 926.84 and 545.30 is: 817.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.35 : 926.84 = 545.30 : x
  2. Step 2: Convert to fraction form
    618.35/926.84 = 545.30/x
  3. Step 3: Cross multiply
    618.35x = 926.84 × 545.30
  4. Step 4: Simplify right side
    618.35x = 505,398.49
  5. Step 5: Solve for x
    x = 505,398.49/618.35
  6. Step 6: Final answer
    x = 817.34

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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.