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Finding the Fourth Proportional to 402,592.58, 555,584.65 and 221,312.15

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Solution

The fourth proportional to 402,592.58, 555,584.65 and 221,312.15 is: 305,414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,592.58 : 555,584.65 = 221,312.15 : x
  2. Step 2: Convert to fraction form
    402,592.58/555,584.65 = 221,312.15/x
  3. Step 3: Cross multiply
    402,592.58x = 555,584.65 × 221,312.15
  4. Step 4: Simplify right side
    402,592.58x = 122,957,630,620.57
  5. Step 5: Solve for x
    x = 122,957,630,620.57/402,592.58
  6. Step 6: Final answer
    x = 305,414.55

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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.