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Finding the Fourth Proportional to 448.17, 669.66 and 355.91

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Solution

The fourth proportional to 448.17, 669.66 and 355.91 is: 531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.17 : 669.66 = 355.91 : x
  2. Step 2: Convert to fraction form
    448.17/669.66 = 355.91/x
  3. Step 3: Cross multiply
    448.17x = 669.66 × 355.91
  4. Step 4: Simplify right side
    448.17x = 238,335.34
  5. Step 5: Solve for x
    x = 238,335.34/448.17
  6. Step 6: Final answer
    x = 531.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.