Home / 428,807.20-643,241.76-113,260

Finding the Fourth Proportional to 428,807.20, 643,241.76 and 113,260

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Solution

The fourth proportional to 428,807.20, 643,241.76 and 113,260 is: 169,898.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,807.20 : 643,241.76 = 113,260 : x
  2. Step 2: Convert to fraction form
    428,807.20/643,241.76 = 113,260/x
  3. Step 3: Cross multiply
    428,807.20x = 643,241.76 × 113,260
  4. Step 4: Simplify right side
    428,807.20x = 72,853,561,737.60
  5. Step 5: Solve for x
    x = 72,853,561,737.60/428,807.20
  6. Step 6: Final answer
    x = 169,898.18

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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.