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Finding the Fourth Proportional to 450.36, 672.72 and 312.24

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Solution

The fourth proportional to 450.36, 672.72 and 312.24 is: 466.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.36 : 672.72 = 312.24 : x
  2. Step 2: Convert to fraction form
    450.36/672.72 = 312.24/x
  3. Step 3: Cross multiply
    450.36x = 672.72 × 312.24
  4. Step 4: Simplify right side
    450.36x = 210,050.09
  5. Step 5: Solve for x
    x = 210,050.09/450.36
  6. Step 6: Final answer
    x = 466.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.