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Finding the Fourth Proportional to 448.32, 672.57 and 140.25

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Solution

The fourth proportional to 448.32, 672.57 and 140.25 is: 210.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.32 : 672.57 = 140.25 : x
  2. Step 2: Convert to fraction form
    448.32/672.57 = 140.25/x
  3. Step 3: Cross multiply
    448.32x = 672.57 × 140.25
  4. Step 4: Simplify right side
    448.32x = 94,327.94
  5. Step 5: Solve for x
    x = 94,327.94/448.32
  6. Step 6: Final answer
    x = 210.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.