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Finding the Fourth Proportional to 555.99, 767.26 and 307.31

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Solution

The fourth proportional to 555.99, 767.26 and 307.31 is: 424.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.99 : 767.26 = 307.31 : x
  2. Step 2: Convert to fraction form
    555.99/767.26 = 307.31/x
  3. Step 3: Cross multiply
    555.99x = 767.26 × 307.31
  4. Step 4: Simplify right side
    555.99x = 235,787.82
  5. Step 5: Solve for x
    x = 235,787.82/555.99
  6. Step 6: Final answer
    x = 424.09

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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.