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Finding the Fourth Proportional to 540.52, 745.90 and 307.68

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Solution

The fourth proportional to 540.52, 745.90 and 307.68 is: 424.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.52 : 745.90 = 307.68 : x
  2. Step 2: Convert to fraction form
    540.52/745.90 = 307.68/x
  3. Step 3: Cross multiply
    540.52x = 745.90 × 307.68
  4. Step 4: Simplify right side
    540.52x = 229,498.51
  5. Step 5: Solve for x
    x = 229,498.51/540.52
  6. Step 6: Final answer
    x = 424.59

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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.