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Finding the Fourth Proportional to 818.37, 1,227.55 and 572.06

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Solution

The fourth proportional to 818.37, 1,227.55 and 572.06 is: 858.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.37 : 1,227.55 = 572.06 : x
  2. Step 2: Convert to fraction form
    818.37/1,227.55 = 572.06/x
  3. Step 3: Cross multiply
    818.37x = 1,227.55 × 572.06
  4. Step 4: Simplify right side
    818.37x = 702,226.12
  5. Step 5: Solve for x
    x = 702,226.12/818.37
  6. Step 6: Final answer
    x = 858.08

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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.