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Finding the Fourth Proportional to 540.26, 745.36 and 307.40

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Solution

The fourth proportional to 540.26, 745.36 and 307.40 is: 424.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.26 : 745.36 = 307.40 : x
  2. Step 2: Convert to fraction form
    540.26/745.36 = 307.40/x
  3. Step 3: Cross multiply
    540.26x = 745.36 × 307.40
  4. Step 4: Simplify right side
    540.26x = 229,123.66
  5. Step 5: Solve for x
    x = 229,123.66/540.26
  6. Step 6: Final answer
    x = 424.10

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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.