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Finding the Fourth Proportional to 458,108.68, 687,235.92 and 221,468.80

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Solution

The fourth proportional to 458,108.68, 687,235.92 and 221,468.80 is: 332,238.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,108.68 : 687,235.92 = 221,468.80 : x
  2. Step 2: Convert to fraction form
    458,108.68/687,235.92 = 221,468.80/x
  3. Step 3: Cross multiply
    458,108.68x = 687,235.92 × 221,468.80
  4. Step 4: Simplify right side
    458,108.68x = 152,201,314,519.30
  5. Step 5: Solve for x
    x = 152,201,314,519.30/458,108.68
  6. Step 6: Final answer
    x = 332,238.44

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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.