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Finding the Fourth Proportional to 617,959.20, 926,420.40 and 322,471.20

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Solution

The fourth proportional to 617,959.20, 926,420.40 and 322,471.20 is: 483,436.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,959.20 : 926,420.40 = 322,471.20 : x
  2. Step 2: Convert to fraction form
    617,959.20/926,420.40 = 322,471.20/x
  3. Step 3: Cross multiply
    617,959.20x = 926,420.40 × 322,471.20
  4. Step 4: Simplify right side
    617,959.20x = 298,743,898,092.48
  5. Step 5: Solve for x
    x = 298,743,898,092.48/617,959.20
  6. Step 6: Final answer
    x = 483,436.28

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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.