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Finding the Fourth Proportional to 868,940.40, 1,302,827.40 and 419,876.40

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Solution

The fourth proportional to 868,940.40, 1,302,827.40 and 419,876.40 is: 629,532.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    868,940.40 : 1,302,827.40 = 419,876.40 : x
  2. Step 2: Convert to fraction form
    868,940.40/1,302,827.40 = 419,876.40/x
  3. Step 3: Cross multiply
    868,940.40x = 1,302,827.40 × 419,876.40
  4. Step 4: Simplify right side
    868,940.40x = 547,026,478,533.36
  5. Step 5: Solve for x
    x = 547,026,478,533.36/868,940.40
  6. Step 6: Final answer
    x = 629,532.79

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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.