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Finding the Fourth Proportional to 402,885.80, 555,982.68 and 221,611.52

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Solution

The fourth proportional to 402,885.80, 555,982.68 and 221,611.52 is: 305,824.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,885.80 : 555,982.68 = 221,611.52 : x
  2. Step 2: Convert to fraction form
    402,885.80/555,982.68 = 221,611.52/x
  3. Step 3: Cross multiply
    402,885.80x = 555,982.68 × 221,611.52
  4. Step 4: Simplify right side
    402,885.80x = 123,212,166,808.47
  5. Step 5: Solve for x
    x = 123,212,166,808.47/402,885.80
  6. Step 6: Final answer
    x = 305,824.05

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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.