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Finding the Fourth Proportional to 477.75, 659.54 and 448.95

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Solution

The fourth proportional to 477.75, 659.54 and 448.95 is: 619.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.75 : 659.54 = 448.95 : x
  2. Step 2: Convert to fraction form
    477.75/659.54 = 448.95/x
  3. Step 3: Cross multiply
    477.75x = 659.54 × 448.95
  4. Step 4: Simplify right side
    477.75x = 296,098.24
  5. Step 5: Solve for x
    x = 296,098.24/477.75
  6. Step 6: Final answer
    x = 619.78

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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.