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Finding the Fourth Proportional to 556.05, 767.34 and 307.39

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Solution

The fourth proportional to 556.05, 767.34 and 307.39 is: 424.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.05 : 767.34 = 307.39 : x
  2. Step 2: Convert to fraction form
    556.05/767.34 = 307.39/x
  3. Step 3: Cross multiply
    556.05x = 767.34 × 307.39
  4. Step 4: Simplify right side
    556.05x = 235,872.64
  5. Step 5: Solve for x
    x = 235,872.64/556.05
  6. Step 6: Final answer
    x = 424.19

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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.