Home / 1,087.61-1,631.34-307.60

Finding the Fourth Proportional to 1,087.61, 1,631.34 and 307.60

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Solution

The fourth proportional to 1,087.61, 1,631.34 and 307.60 is: 461.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.61 : 1,631.34 = 307.60 : x
  2. Step 2: Convert to fraction form
    1,087.61/1,631.34 = 307.60/x
  3. Step 3: Cross multiply
    1,087.61x = 1,631.34 × 307.60
  4. Step 4: Simplify right side
    1,087.61x = 501,796.11
  5. Step 5: Solve for x
    x = 501,796.11/1,087.61
  6. Step 6: Final answer
    x = 461.37

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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.