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Finding the Fourth Proportional to 338,539.80, 507,809.70 and 322,987.80

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Solution

The fourth proportional to 338,539.80, 507,809.70 and 322,987.80 is: 484,481.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,539.80 : 507,809.70 = 322,987.80 : x
  2. Step 2: Convert to fraction form
    338,539.80/507,809.70 = 322,987.80/x
  3. Step 3: Cross multiply
    338,539.80x = 507,809.70 × 322,987.80
  4. Step 4: Simplify right side
    338,539.80x = 164,016,337,821.66
  5. Step 5: Solve for x
    x = 164,016,337,821.66/338,539.80
  6. Step 6: Final answer
    x = 484,481.70

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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.