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Finding the Fourth Proportional to 451.46, 623.10 and 285.74

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Solution

The fourth proportional to 451.46, 623.10 and 285.74 is: 394.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.46 : 623.10 = 285.74 : x
  2. Step 2: Convert to fraction form
    451.46/623.10 = 285.74/x
  3. Step 3: Cross multiply
    451.46x = 623.10 × 285.74
  4. Step 4: Simplify right side
    451.46x = 178,044.59
  5. Step 5: Solve for x
    x = 178,044.59/451.46
  6. Step 6: Final answer
    x = 394.38

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Double scale
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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.