Home / 1,487.21-2,052.68-1,238.13

Finding the Fourth Proportional to 1,487.21, 2,052.68 and 1,238.13

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Solution

The fourth proportional to 1,487.21, 2,052.68 and 1,238.13 is: 1,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.21 : 2,052.68 = 1,238.13 : x
  2. Step 2: Convert to fraction form
    1,487.21/2,052.68 = 1,238.13/x
  3. Step 3: Cross multiply
    1,487.21x = 2,052.68 × 1,238.13
  4. Step 4: Simplify right side
    1,487.21x = 2,541,478.50
  5. Step 5: Solve for x
    x = 2,541,478.50/1,487.21
  6. Step 6: Final answer
    x = 1,708.90

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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.