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Finding the Fourth Proportional to 451.39, 623.10 and 340.89

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Solution

The fourth proportional to 451.39, 623.10 and 340.89 is: 470.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.39 : 623.10 = 340.89 : x
  2. Step 2: Convert to fraction form
    451.39/623.10 = 340.89/x
  3. Step 3: Cross multiply
    451.39x = 623.10 × 340.89
  4. Step 4: Simplify right side
    451.39x = 212,408.56
  5. Step 5: Solve for x
    x = 212,408.56/451.39
  6. Step 6: Final answer
    x = 470.57

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Double scale
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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.