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Finding the Fourth Proportional to 556.55, 768.01 and 307.88

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Solution

The fourth proportional to 556.55, 768.01 and 307.88 is: 424.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.55 : 768.01 = 307.88 : x
  2. Step 2: Convert to fraction form
    556.55/768.01 = 307.88/x
  3. Step 3: Cross multiply
    556.55x = 768.01 × 307.88
  4. Step 4: Simplify right side
    556.55x = 236,454.92
  5. Step 5: Solve for x
    x = 236,454.92/556.55
  6. Step 6: Final answer
    x = 424.86

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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.