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Finding the Fourth Proportional to 824.94, 1,138.40 and 451.94

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Solution

The fourth proportional to 824.94, 1,138.40 and 451.94 is: 623.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.94 : 1,138.40 = 451.94 : x
  2. Step 2: Convert to fraction form
    824.94/1,138.40 = 451.94/x
  3. Step 3: Cross multiply
    824.94x = 1,138.40 × 451.94
  4. Step 4: Simplify right side
    824.94x = 514,482.24
  5. Step 5: Solve for x
    x = 514,482.24/824.94
  6. Step 6: Final answer
    x = 623.66

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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.