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Finding the Fourth Proportional to 448.24, 617.16 and 389.68

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Solution

The fourth proportional to 448.24, 617.16 and 389.68 is: 536.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.24 : 617.16 = 389.68 : x
  2. Step 2: Convert to fraction form
    448.24/617.16 = 389.68/x
  3. Step 3: Cross multiply
    448.24x = 617.16 × 389.68
  4. Step 4: Simplify right side
    448.24x = 240,494.91
  5. Step 5: Solve for x
    x = 240,494.91/448.24
  6. Step 6: Final answer
    x = 536.53

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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.