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Finding the Fourth Proportional to 448.61, 673.92 and 387.08

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Solution

The fourth proportional to 448.61, 673.92 and 387.08 is: 581.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.61 : 673.92 = 387.08 : x
  2. Step 2: Convert to fraction form
    448.61/673.92 = 387.08/x
  3. Step 3: Cross multiply
    448.61x = 673.92 × 387.08
  4. Step 4: Simplify right side
    448.61x = 260,860.11
  5. Step 5: Solve for x
    x = 260,860.11/448.61
  6. Step 6: Final answer
    x = 581.49

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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.