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Finding the Fourth Proportional to 557.89, 770.39 and 448.17

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Solution

The fourth proportional to 557.89, 770.39 and 448.17 is: 618.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    557.89 : 770.39 = 448.17 : x
  2. Step 2: Convert to fraction form
    557.89/770.39 = 448.17/x
  3. Step 3: Cross multiply
    557.89x = 770.39 × 448.17
  4. Step 4: Simplify right side
    557.89x = 345,264.76
  5. Step 5: Solve for x
    x = 345,264.76/557.89
  6. Step 6: Final answer
    x = 618.88

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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.