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Finding the Fourth Proportional to 1,507.31, 2,257.88 and 920.46

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Solution

The fourth proportional to 1,507.31, 2,257.88 and 920.46 is: 1,378.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.31 : 2,257.88 = 920.46 : x
  2. Step 2: Convert to fraction form
    1,507.31/2,257.88 = 920.46/x
  3. Step 3: Cross multiply
    1,507.31x = 2,257.88 × 920.46
  4. Step 4: Simplify right side
    1,507.31x = 2,078,292.09
  5. Step 5: Solve for x
    x = 2,078,292.09/1,507.31
  6. Step 6: Final answer
    x = 1,378.81

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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.