Home / 1,087.47-1,629.90-437.85

Finding the Fourth Proportional to 1,087.47, 1,629.90 and 437.85

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Solution

The fourth proportional to 1,087.47, 1,629.90 and 437.85 is: 656.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.47 : 1,629.90 = 437.85 : x
  2. Step 2: Convert to fraction form
    1,087.47/1,629.90 = 437.85/x
  3. Step 3: Cross multiply
    1,087.47x = 1,629.90 × 437.85
  4. Step 4: Simplify right side
    1,087.47x = 713,651.72
  5. Step 5: Solve for x
    x = 713,651.72/1,087.47
  6. Step 6: Final answer
    x = 656.25

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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.