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Finding the Fourth Proportional to 666.24, 998.64 and 545.04

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Solution

The fourth proportional to 666.24, 998.64 and 545.04 is: 816.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.24 : 998.64 = 545.04 : x
  2. Step 2: Convert to fraction form
    666.24/998.64 = 545.04/x
  3. Step 3: Cross multiply
    666.24x = 998.64 × 545.04
  4. Step 4: Simplify right side
    666.24x = 544,298.75
  5. Step 5: Solve for x
    x = 544,298.75/666.24
  6. Step 6: Final answer
    x = 816.97

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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.