Home / 487,816.90-731,944.05-221,440.30

Finding the Fourth Proportional to 487,816.90, 731,944.05 and 221,440.30

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Solution

The fourth proportional to 487,816.90, 731,944.05 and 221,440.30 is: 332,259.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,816.90 : 731,944.05 = 221,440.30 : x
  2. Step 2: Convert to fraction form
    487,816.90/731,944.05 = 221,440.30/x
  3. Step 3: Cross multiply
    487,816.90x = 731,944.05 × 221,440.30
  4. Step 4: Simplify right side
    487,816.90x = 162,081,910,015.22
  5. Step 5: Solve for x
    x = 162,081,910,015.22/487,816.90
  6. Step 6: Final answer
    x = 332,259.73

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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.