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Finding the Fourth Proportional to 899.43, 1,240.90 and 506.37

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Solution

The fourth proportional to 899.43, 1,240.90 and 506.37 is: 698.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.43 : 1,240.90 = 506.37 : x
  2. Step 2: Convert to fraction form
    899.43/1,240.90 = 506.37/x
  3. Step 3: Cross multiply
    899.43x = 1,240.90 × 506.37
  4. Step 4: Simplify right side
    899.43x = 628,354.53
  5. Step 5: Solve for x
    x = 628,354.53/899.43
  6. Step 6: Final answer
    x = 698.61

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1.5x scale

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.