Home / 487,738.20-731,261.70-221,626.20

Finding the Fourth Proportional to 487,738.20, 731,261.70 and 221,626.20

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Solution

The fourth proportional to 487,738.20, 731,261.70 and 221,626.20 is: 332,282.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,738.20 : 731,261.70 = 221,626.20 : x
  2. Step 2: Convert to fraction form
    487,738.20/731,261.70 = 221,626.20/x
  3. Step 3: Cross multiply
    487,738.20x = 731,261.70 × 221,626.20
  4. Step 4: Simplify right side
    487,738.20x = 162,066,751,776.54
  5. Step 5: Solve for x
    x = 162,066,751,776.54/487,738.20
  6. Step 6: Final answer
    x = 332,282.26

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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.