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Finding the Fourth Proportional to 448.79, 617.73 and 317.57

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Solution

The fourth proportional to 448.79, 617.73 and 317.57 is: 437.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.79 : 617.73 = 317.57 : x
  2. Step 2: Convert to fraction form
    448.79/617.73 = 317.57/x
  3. Step 3: Cross multiply
    448.79x = 617.73 × 317.57
  4. Step 4: Simplify right side
    448.79x = 196,171.71
  5. Step 5: Solve for x
    x = 196,171.71/448.79
  6. Step 6: Final answer
    x = 437.11

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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.