Home / 1,087.23-1,631.05-438.02

Finding the Fourth Proportional to 1,087.23, 1,631.05 and 438.02

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Solution

The fourth proportional to 1,087.23, 1,631.05 and 438.02 is: 657.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.23 : 1,631.05 = 438.02 : x
  2. Step 2: Convert to fraction form
    1,087.23/1,631.05 = 438.02/x
  3. Step 3: Cross multiply
    1,087.23x = 1,631.05 × 438.02
  4. Step 4: Simplify right side
    1,087.23x = 714,424.37
  5. Step 5: Solve for x
    x = 714,424.37/1,087.23
  6. Step 6: Final answer
    x = 657.11

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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.