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Finding the Fourth Proportional to 430,818.71, 646,321.28 and 131,291.37

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Solution

The fourth proportional to 430,818.71, 646,321.28 and 131,291.37 is: 196,965.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,818.71 : 646,321.28 = 131,291.37 : x
  2. Step 2: Convert to fraction form
    430,818.71/646,321.28 = 131,291.37/x
  3. Step 3: Cross multiply
    430,818.71x = 646,321.28 × 131,291.37
  4. Step 4: Simplify right side
    430,818.71x = 84,856,405,654.90
  5. Step 5: Solve for x
    x = 84,856,405,654.90/430,818.71
  6. Step 6: Final answer
    x = 196,965.46

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1.5x scale

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.