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Finding the Fourth Proportional to 503.31, 755.21 and 340.64

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Solution

The fourth proportional to 503.31, 755.21 and 340.64 is: 511.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    503.31 : 755.21 = 340.64 : x
  2. Step 2: Convert to fraction form
    503.31/755.21 = 340.64/x
  3. Step 3: Cross multiply
    503.31x = 755.21 × 340.64
  4. Step 4: Simplify right side
    503.31x = 257,254.73
  5. Step 5: Solve for x
    x = 257,254.73/503.31
  6. Step 6: Final answer
    x = 511.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.