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Finding the Fourth Proportional to 824.50, 1,137.88 and 475.19

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Solution

The fourth proportional to 824.50, 1,137.88 and 475.19 is: 655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.50 : 1,137.88 = 475.19 : x
  2. Step 2: Convert to fraction form
    824.50/1,137.88 = 475.19/x
  3. Step 3: Cross multiply
    824.50x = 1,137.88 × 475.19
  4. Step 4: Simplify right side
    824.50x = 540,709.20
  5. Step 5: Solve for x
    x = 540,709.20/824.50
  6. Step 6: Final answer
    x = 655.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.