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Finding the Fourth Proportional to 555.99, 767.27 and 307.31

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Solution

The fourth proportional to 555.99, 767.27 and 307.31 is: 424.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.99 : 767.27 = 307.31 : x
  2. Step 2: Convert to fraction form
    555.99/767.27 = 307.31/x
  3. Step 3: Cross multiply
    555.99x = 767.27 × 307.31
  4. Step 4: Simplify right side
    555.99x = 235,786.68
  5. Step 5: Solve for x
    x = 235,786.68/555.99
  6. Step 6: Final answer
    x = 424.08

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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.