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Finding the Fourth Proportional to 611,213.10, 916,819.65 and 162,003.30

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Solution

The fourth proportional to 611,213.10, 916,819.65 and 162,003.30 is: 243,004.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,213.10 : 916,819.65 = 162,003.30 : x
  2. Step 2: Convert to fraction form
    611,213.10/916,819.65 = 162,003.30/x
  3. Step 3: Cross multiply
    611,213.10x = 916,819.65 × 162,003.30
  4. Step 4: Simplify right side
    611,213.10x = 148,527,808,804.85
  5. Step 5: Solve for x
    x = 148,527,808,804.85/611,213.10
  6. Step 6: Final answer
    x = 243,004.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.