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Finding the Fourth Proportional to 418,608.12, 577,690.20 and 227,632.80

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Solution

The fourth proportional to 418,608.12, 577,690.20 and 227,632.80 is: 314,139.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,608.12 : 577,690.20 = 227,632.80 : x
  2. Step 2: Convert to fraction form
    418,608.12/577,690.20 = 227,632.80/x
  3. Step 3: Cross multiply
    418,608.12x = 577,690.20 × 227,632.80
  4. Step 4: Simplify right side
    418,608.12x = 131,501,237,758.56
  5. Step 5: Solve for x
    x = 131,501,237,758.56/418,608.12
  6. Step 6: Final answer
    x = 314,139.24

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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.