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Finding the Fourth Proportional to 430,630.71, 645,511.83 and 270,820.85

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Solution

The fourth proportional to 430,630.71, 645,511.83 and 270,820.85 is: 405,958.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,630.71 : 645,511.83 = 270,820.85 : x
  2. Step 2: Convert to fraction form
    430,630.71/645,511.83 = 270,820.85/x
  3. Step 3: Cross multiply
    430,630.71x = 645,511.83 × 270,820.85
  4. Step 4: Simplify right side
    430,630.71x = 174,818,062,485.66
  5. Step 5: Solve for x
    x = 174,818,062,485.66/430,630.71
  6. Step 6: Final answer
    x = 405,958.19

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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.