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Finding the Fourth Proportional to 556.18, 767.50 and 307.49

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Solution

The fourth proportional to 556.18, 767.50 and 307.49 is: 424.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.18 : 767.50 = 307.49 : x
  2. Step 2: Convert to fraction form
    556.18/767.50 = 307.49/x
  3. Step 3: Cross multiply
    556.18x = 767.50 × 307.49
  4. Step 4: Simplify right side
    556.18x = 235,996.18
  5. Step 5: Solve for x
    x = 235,996.18/556.18
  6. Step 6: Final answer
    x = 424.31

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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.