Home / 305,117.80-421,221-236,982.22

Finding the Fourth Proportional to 305,117.80, 421,221 and 236,982.22

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Solution

The fourth proportional to 305,117.80, 421,221 and 236,982.22 is: 327,158.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,117.80 : 421,221 = 236,982.22 : x
  2. Step 2: Convert to fraction form
    305,117.80/421,221 = 236,982.22/x
  3. Step 3: Cross multiply
    305,117.80x = 421,221 × 236,982.22
  4. Step 4: Simplify right side
    305,117.80x = 99,821,887,690.62
  5. Step 5: Solve for x
    x = 99,821,887,690.62/305,117.80
  6. Step 6: Final answer
    x = 327,158.52

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1.5x scale

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.