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Finding the Fourth Proportional to 402,481.72, 555,438.09 and 221,200.08

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Solution

The fourth proportional to 402,481.72, 555,438.09 and 221,200.08 is: 305,263.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,481.72 : 555,438.09 = 221,200.08 : x
  2. Step 2: Convert to fraction form
    402,481.72/555,438.09 = 221,200.08/x
  3. Step 3: Cross multiply
    402,481.72x = 555,438.09 × 221,200.08
  4. Step 4: Simplify right side
    402,481.72x = 122,862,947,165.86
  5. Step 5: Solve for x
    x = 122,862,947,165.86/402,481.72
  6. Step 6: Final answer
    x = 305,263.42

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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.