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Finding the Fourth Proportional to 419,156.49, 577,155.03 and 315,940.65

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Solution

The fourth proportional to 419,156.49, 577,155.03 and 315,940.65 is: 435,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,156.49 : 577,155.03 = 315,940.65 : x
  2. Step 2: Convert to fraction form
    419,156.49/577,155.03 = 315,940.65/x
  3. Step 3: Cross multiply
    419,156.49x = 577,155.03 × 315,940.65
  4. Step 4: Simplify right side
    419,156.49x = 182,346,735,328.97
  5. Step 5: Solve for x
    x = 182,346,735,328.97/419,156.49
  6. Step 6: Final answer
    x = 435,032.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.