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Finding the Fourth Proportional to 402,021.66, 554,790.98 and 220,745.34

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Solution

The fourth proportional to 402,021.66, 554,790.98 and 220,745.34 is: 304,629.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,021.66 : 554,790.98 = 220,745.34 : x
  2. Step 2: Convert to fraction form
    402,021.66/554,790.98 = 220,745.34/x
  3. Step 3: Cross multiply
    402,021.66x = 554,790.98 × 220,745.34
  4. Step 4: Simplify right side
    402,021.66x = 122,467,524,060.90
  5. Step 5: Solve for x
    x = 122,467,524,060.90/402,021.66
  6. Step 6: Final answer
    x = 304,629.17

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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.