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Finding the Fourth Proportional to 419,980.59, 579,558.78 and 238,689.36

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Solution

The fourth proportional to 419,980.59, 579,558.78 and 238,689.36 is: 329,383.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,980.59 : 579,558.78 = 238,689.36 : x
  2. Step 2: Convert to fraction form
    419,980.59/579,558.78 = 238,689.36/x
  3. Step 3: Cross multiply
    419,980.59x = 579,558.78 × 238,689.36
  4. Step 4: Simplify right side
    419,980.59x = 138,334,514,280.58
  5. Step 5: Solve for x
    x = 138,334,514,280.58/419,980.59
  6. Step 6: Final answer
    x = 329,383.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.