Home / 771,503.40-1,157,439.87-321,974.21

Finding the Fourth Proportional to 771,503.40, 1,157,439.87 and 321,974.21

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Solution

The fourth proportional to 771,503.40, 1,157,439.87 and 321,974.21 is: 483,038.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    771,503.40 : 1,157,439.87 = 321,974.21 : x
  2. Step 2: Convert to fraction form
    771,503.40/1,157,439.87 = 321,974.21/x
  3. Step 3: Cross multiply
    771,503.40x = 1,157,439.87 × 321,974.21
  4. Step 4: Simplify right side
    771,503.40x = 372,665,790,659.35
  5. Step 5: Solve for x
    x = 372,665,790,659.35/771,503.40
  6. Step 6: Final answer
    x = 483,038.43

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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.