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Finding the Fourth Proportional to 451.34, 623.09 and 304.75

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Solution

The fourth proportional to 451.34, 623.09 and 304.75 is: 420.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.34 : 623.09 = 304.75 : x
  2. Step 2: Convert to fraction form
    451.34/623.09 = 304.75/x
  3. Step 3: Cross multiply
    451.34x = 623.09 × 304.75
  4. Step 4: Simplify right side
    451.34x = 189,886.68
  5. Step 5: Solve for x
    x = 189,886.68/451.34
  6. Step 6: Final answer
    x = 420.72

Related Problems

Find fourth proportional to 225.67, 311.55 and 152.38
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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.