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Finding the Fourth Proportional to 430,426.40, 645,639.60 and 110,577.65

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Solution

The fourth proportional to 430,426.40, 645,639.60 and 110,577.65 is: 165,866.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,426.40 : 645,639.60 = 110,577.65 : x
  2. Step 2: Convert to fraction form
    430,426.40/645,639.60 = 110,577.65/x
  3. Step 3: Cross multiply
    430,426.40x = 645,639.60 × 110,577.65
  4. Step 4: Simplify right side
    430,426.40x = 71,393,309,714.94
  5. Step 5: Solve for x
    x = 71,393,309,714.94/430,426.40
  6. Step 6: Final answer
    x = 165,866.48

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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.