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Finding the Fourth Proportional to 539.33, 744.12 and 312.12

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Solution

The fourth proportional to 539.33, 744.12 and 312.12 is: 430.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.33 : 744.12 = 312.12 : x
  2. Step 2: Convert to fraction form
    539.33/744.12 = 312.12/x
  3. Step 3: Cross multiply
    539.33x = 744.12 × 312.12
  4. Step 4: Simplify right side
    539.33x = 232,254.73
  5. Step 5: Solve for x
    x = 232,254.73/539.33
  6. Step 6: Final answer
    x = 430.64

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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.