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Finding the Fourth Proportional to 540.78, 745.64 and 501.90

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Solution

The fourth proportional to 540.78, 745.64 and 501.90 is: 692.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.78 : 745.64 = 501.90 : x
  2. Step 2: Convert to fraction form
    540.78/745.64 = 501.90/x
  3. Step 3: Cross multiply
    540.78x = 745.64 × 501.90
  4. Step 4: Simplify right side
    540.78x = 374,236.72
  5. Step 5: Solve for x
    x = 374,236.72/540.78
  6. Step 6: Final answer
    x = 692.03

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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.