Home / 1,087.32-1,631.21-509.88

Finding the Fourth Proportional to 1,087.32, 1,631.21 and 509.88

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Solution

The fourth proportional to 1,087.32, 1,631.21 and 509.88 is: 764.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.32 : 1,631.21 = 509.88 : x
  2. Step 2: Convert to fraction form
    1,087.32/1,631.21 = 509.88/x
  3. Step 3: Cross multiply
    1,087.32x = 1,631.21 × 509.88
  4. Step 4: Simplify right side
    1,087.32x = 831,721.35
  5. Step 5: Solve for x
    x = 831,721.35/1,087.32
  6. Step 6: Final answer
    x = 764.93

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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.