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Finding the Fourth Proportional to 402,819.77, 555,893.30 and 221,543.29

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Solution

The fourth proportional to 402,819.77, 555,893.30 and 221,543.29 is: 305,730.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,819.77 : 555,893.30 = 221,543.29 : x
  2. Step 2: Convert to fraction form
    402,819.77/555,893.30 = 221,543.29/x
  3. Step 3: Cross multiply
    402,819.77x = 555,893.30 × 221,543.29
  4. Step 4: Simplify right side
    402,819.77x = 123,154,430,573.50
  5. Step 5: Solve for x
    x = 123,154,430,573.50/402,819.77
  6. Step 6: Final answer
    x = 305,730.85

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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.