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Finding the Fourth Proportional to 487,503.72, 731,165.94 and 221,200.20

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Solution

The fourth proportional to 487,503.72, 731,165.94 and 221,200.20 is: 331,759.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,503.72 : 731,165.94 = 221,200.20 : x
  2. Step 2: Convert to fraction form
    487,503.72/731,165.94 = 221,200.20/x
  3. Step 3: Cross multiply
    487,503.72x = 731,165.94 × 221,200.20
  4. Step 4: Simplify right side
    487,503.72x = 161,734,052,161.19
  5. Step 5: Solve for x
    x = 161,734,052,161.19/487,503.72
  6. Step 6: Final answer
    x = 331,759.63

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1.5x scale

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.