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Finding the Fourth Proportional to 338,511.68, 507,684 and 138,888.80

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Solution

The fourth proportional to 338,511.68, 507,684 and 138,888.80 is: 208,298.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,511.68 : 507,684 = 138,888.80 : x
  2. Step 2: Convert to fraction form
    338,511.68/507,684 = 138,888.80/x
  3. Step 3: Cross multiply
    338,511.68x = 507,684 × 138,888.80
  4. Step 4: Simplify right side
    338,511.68x = 70,511,621,539.20
  5. Step 5: Solve for x
    x = 70,511,621,539.20/338,511.68
  6. Step 6: Final answer
    x = 208,298.93

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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.