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Finding the Fourth Proportional to 824.55, 1,137.89 and 451.54

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Solution

The fourth proportional to 824.55, 1,137.89 and 451.54 is: 623.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.55 : 1,137.89 = 451.54 : x
  2. Step 2: Convert to fraction form
    824.55/1,137.89 = 451.54/x
  3. Step 3: Cross multiply
    824.55x = 1,137.89 × 451.54
  4. Step 4: Simplify right side
    824.55x = 513,802.85
  5. Step 5: Solve for x
    x = 513,802.85/824.55
  6. Step 6: Final answer
    x = 623.14

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1.5x scale

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.