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Finding the Fourth Proportional to 402,415.35, 555,299.96 and 221,117.91

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Solution

The fourth proportional to 402,415.35, 555,299.96 and 221,117.91 is: 305,124.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,415.35 : 555,299.96 = 221,117.91 : x
  2. Step 2: Convert to fraction form
    402,415.35/555,299.96 = 221,117.91/x
  3. Step 3: Cross multiply
    402,415.35x = 555,299.96 × 221,117.91
  4. Step 4: Simplify right side
    402,415.35x = 122,786,765,472.69
  5. Step 5: Solve for x
    x = 122,786,765,472.69/402,415.35
  6. Step 6: Final answer
    x = 305,124.46

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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.