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Finding the Fourth Proportional to 571.74, 855.99 and 545.10

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Solution

The fourth proportional to 571.74, 855.99 and 545.10 is: 816.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.74 : 855.99 = 545.10 : x
  2. Step 2: Convert to fraction form
    571.74/855.99 = 545.10/x
  3. Step 3: Cross multiply
    571.74x = 855.99 × 545.10
  4. Step 4: Simplify right side
    571.74x = 466,600.15
  5. Step 5: Solve for x
    x = 466,600.15/571.74
  6. Step 6: Final answer
    x = 816.11

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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.