Home / 1,087.56-1,631.40-307.63

Finding the Fourth Proportional to 1,087.56, 1,631.40 and 307.63

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Solution

The fourth proportional to 1,087.56, 1,631.40 and 307.63 is: 461.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.56 : 1,631.40 = 307.63 : x
  2. Step 2: Convert to fraction form
    1,087.56/1,631.40 = 307.63/x
  3. Step 3: Cross multiply
    1,087.56x = 1,631.40 × 307.63
  4. Step 4: Simplify right side
    1,087.56x = 501,867.58
  5. Step 5: Solve for x
    x = 501,867.58/1,087.56
  6. Step 6: Final answer
    x = 461.46

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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.