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Finding the Fourth Proportional to 534.21, 737.31 and 313.15

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Solution

The fourth proportional to 534.21, 737.31 and 313.15 is: 432.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.21 : 737.31 = 313.15 : x
  2. Step 2: Convert to fraction form
    534.21/737.31 = 313.15/x
  3. Step 3: Cross multiply
    534.21x = 737.31 × 313.15
  4. Step 4: Simplify right side
    534.21x = 230,888.63
  5. Step 5: Solve for x
    x = 230,888.63/534.21
  6. Step 6: Final answer
    x = 432.21

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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.