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Finding the Fourth Proportional to 338,468.42, 507,536.76 and 138,734.48

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Solution

The fourth proportional to 338,468.42, 507,536.76 and 138,734.48 is: 208,033.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,468.42 : 507,536.76 = 138,734.48 : x
  2. Step 2: Convert to fraction form
    338,468.42/507,536.76 = 138,734.48/x
  3. Step 3: Cross multiply
    338,468.42x = 507,536.76 × 138,734.48
  4. Step 4: Simplify right side
    338,468.42x = 70,412,848,479.48
  5. Step 5: Solve for x
    x = 70,412,848,479.48/338,468.42
  6. Step 6: Final answer
    x = 208,033.73

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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.