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Finding the Fourth Proportional to 571.11, 857.47 and 545.01

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Solution

The fourth proportional to 571.11, 857.47 and 545.01 is: 818.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.11 : 857.47 = 545.01 : x
  2. Step 2: Convert to fraction form
    571.11/857.47 = 545.01/x
  3. Step 3: Cross multiply
    571.11x = 857.47 × 545.01
  4. Step 4: Simplify right side
    571.11x = 467,329.72
  5. Step 5: Solve for x
    x = 467,329.72/571.11
  6. Step 6: Final answer
    x = 818.28

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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.