Home / 1,087.39-1,500.57-621.64

Finding the Fourth Proportional to 1,087.39, 1,500.57 and 621.64

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Solution

The fourth proportional to 1,087.39, 1,500.57 and 621.64 is: 857.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.39 : 1,500.57 = 621.64 : x
  2. Step 2: Convert to fraction form
    1,087.39/1,500.57 = 621.64/x
  3. Step 3: Cross multiply
    1,087.39x = 1,500.57 × 621.64
  4. Step 4: Simplify right side
    1,087.39x = 932,814.33
  5. Step 5: Solve for x
    x = 932,814.33/1,087.39
  6. Step 6: Final answer
    x = 857.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.