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Finding the Fourth Proportional to 402,611.25, 555,610.55 and 221,330.82

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Solution

The fourth proportional to 402,611.25, 555,610.55 and 221,330.82 is: 305,440.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,611.25 : 555,610.55 = 221,330.82 : x
  2. Step 2: Convert to fraction form
    402,611.25/555,610.55 = 221,330.82/x
  3. Step 3: Cross multiply
    402,611.25x = 555,610.55 × 221,330.82
  4. Step 4: Simplify right side
    402,611.25x = 122,973,737,525.50
  5. Step 5: Solve for x
    x = 122,973,737,525.50/402,611.25
  6. Step 6: Final answer
    x = 305,440.39

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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.