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Finding the Fourth Proportional to 1,507.75, 2,261.06 and 520.31

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Solution

The fourth proportional to 1,507.75, 2,261.06 and 520.31 is: 780.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.75 : 2,261.06 = 520.31 : x
  2. Step 2: Convert to fraction form
    1,507.75/2,261.06 = 520.31/x
  3. Step 3: Cross multiply
    1,507.75x = 2,261.06 × 520.31
  4. Step 4: Simplify right side
    1,507.75x = 1,176,449.97
  5. Step 5: Solve for x
    x = 1,176,449.97/1,507.75
  6. Step 6: Final answer
    x = 780.27

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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.