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Finding the Fourth Proportional to 448.40, 672.81 and 242.90

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Solution

The fourth proportional to 448.40, 672.81 and 242.90 is: 364.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.40 : 672.81 = 242.90 : x
  2. Step 2: Convert to fraction form
    448.40/672.81 = 242.90/x
  3. Step 3: Cross multiply
    448.40x = 672.81 × 242.90
  4. Step 4: Simplify right side
    448.40x = 163,423.80
  5. Step 5: Solve for x
    x = 163,423.80/448.40
  6. Step 6: Final answer
    x = 364.46

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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.