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Finding the Fourth Proportional to 338,648.40, 507,936.96 and 138,989.88

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Solution

The fourth proportional to 338,648.40, 507,936.96 and 138,989.88 is: 208,470.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,648.40 : 507,936.96 = 138,989.88 : x
  2. Step 2: Convert to fraction form
    338,648.40/507,936.96 = 138,989.88/x
  3. Step 3: Cross multiply
    338,648.40x = 507,936.96 × 138,989.88
  4. Step 4: Simplify right side
    338,648.40x = 70,598,097,117.96
  5. Step 5: Solve for x
    x = 70,598,097,117.96/338,648.40
  6. Step 6: Final answer
    x = 208,470.19

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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.