Home / 1,087.16-1,629.58-437.20

Finding the Fourth Proportional to 1,087.16, 1,629.58 and 437.20

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Solution

The fourth proportional to 1,087.16, 1,629.58 and 437.20 is: 655.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.16 : 1,629.58 = 437.20 : x
  2. Step 2: Convert to fraction form
    1,087.16/1,629.58 = 437.20/x
  3. Step 3: Cross multiply
    1,087.16x = 1,629.58 × 437.20
  4. Step 4: Simplify right side
    1,087.16x = 712,452.38
  5. Step 5: Solve for x
    x = 712,452.38/1,087.16
  6. Step 6: Final answer
    x = 655.33

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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.