Home / 643,145.20-964,026.60-243,631.60

Finding the Fourth Proportional to 643,145.20, 964,026.60 and 243,631.60

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Solution

The fourth proportional to 643,145.20, 964,026.60 and 243,631.60 is: 365,185.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,145.20 : 964,026.60 = 243,631.60 : x
  2. Step 2: Convert to fraction form
    643,145.20/964,026.60 = 243,631.60/x
  3. Step 3: Cross multiply
    643,145.20x = 964,026.60 × 243,631.60
  4. Step 4: Simplify right side
    643,145.20x = 234,867,343,000.56
  5. Step 5: Solve for x
    x = 234,867,343,000.56/643,145.20
  6. Step 6: Final answer
    x = 365,185.56

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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.