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Finding the Fourth Proportional to 642,958.65, 964,490.57 and 322,945.97

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Solution

The fourth proportional to 642,958.65, 964,490.57 and 322,945.97 is: 484,445.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,958.65 : 964,490.57 = 322,945.97 : x
  2. Step 2: Convert to fraction form
    642,958.65/964,490.57 = 322,945.97/x
  3. Step 3: Cross multiply
    642,958.65x = 964,490.57 × 322,945.97
  4. Step 4: Simplify right side
    642,958.65x = 311,478,341,069.77
  5. Step 5: Solve for x
    x = 311,478,341,069.77/642,958.65
  6. Step 6: Final answer
    x = 484,445.37

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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.