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Finding the Fourth Proportional to 540.95, 746.48 and 319.91

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Solution

The fourth proportional to 540.95, 746.48 and 319.91 is: 441.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.95 : 746.48 = 319.91 : x
  2. Step 2: Convert to fraction form
    540.95/746.48 = 319.91/x
  3. Step 3: Cross multiply
    540.95x = 746.48 × 319.91
  4. Step 4: Simplify right side
    540.95x = 238,801.08
  5. Step 5: Solve for x
    x = 238,801.08/540.95
  6. Step 6: Final answer
    x = 441.45

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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.