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Finding the Fourth Proportional to 1,507.88, 2,260.91 and 987.26

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Solution

The fourth proportional to 1,507.88, 2,260.91 and 987.26 is: 1,480.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,507.88 : 2,260.91 = 987.26 : x
  2. Step 2: Convert to fraction form
    1,507.88/2,260.91 = 987.26/x
  3. Step 3: Cross multiply
    1,507.88x = 2,260.91 × 987.26
  4. Step 4: Simplify right side
    1,507.88x = 2,232,097.17
  5. Step 5: Solve for x
    x = 2,232,097.17/1,507.88
  6. Step 6: Final answer
    x = 1,480.29

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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.