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Finding the Fourth Proportional to 402,636.75, 555,649.31 and 221,353.25

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Solution

The fourth proportional to 402,636.75, 555,649.31 and 221,353.25 is: 305,473.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,636.75 : 555,649.31 = 221,353.25 : x
  2. Step 2: Convert to fraction form
    402,636.75/555,649.31 = 221,353.25/x
  3. Step 3: Cross multiply
    402,636.75x = 555,649.31 × 221,353.25
  4. Step 4: Simplify right side
    402,636.75x = 122,994,776,743.75
  5. Step 5: Solve for x
    x = 122,994,776,743.75/402,636.75
  6. Step 6: Final answer
    x = 305,473.30

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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.