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Finding the Fourth Proportional to 824.02, 1,137.15 and 487.94

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Solution

The fourth proportional to 824.02, 1,137.15 and 487.94 is: 673.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.02 : 1,137.15 = 487.94 : x
  2. Step 2: Convert to fraction form
    824.02/1,137.15 = 487.94/x
  3. Step 3: Cross multiply
    824.02x = 1,137.15 × 487.94
  4. Step 4: Simplify right side
    824.02x = 554,855.29
  5. Step 5: Solve for x
    x = 554,855.29/824.02
  6. Step 6: Final answer
    x = 673.35

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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.