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Finding the Fourth Proportional to 539.08, 744.28 and 421.18

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Solution

The fourth proportional to 539.08, 744.28 and 421.18 is: 581.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.08 : 744.28 = 421.18 : x
  2. Step 2: Convert to fraction form
    539.08/744.28 = 421.18/x
  3. Step 3: Cross multiply
    539.08x = 744.28 × 421.18
  4. Step 4: Simplify right side
    539.08x = 313,475.85
  5. Step 5: Solve for x
    x = 313,475.85/539.08
  6. Step 6: Final answer
    x = 581.50

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1.5x scale

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.