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Finding the Fourth Proportional to 265,557.38, 398,453.82 and 139,167.58

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Solution

The fourth proportional to 265,557.38, 398,453.82 and 139,167.58 is: 208,813.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,557.38 : 398,453.82 = 139,167.58 : x
  2. Step 2: Convert to fraction form
    265,557.38/398,453.82 = 139,167.58/x
  3. Step 3: Cross multiply
    265,557.38x = 398,453.82 × 139,167.58
  4. Step 4: Simplify right side
    265,557.38x = 55,451,852,875.02
  5. Step 5: Solve for x
    x = 55,451,852,875.02/265,557.38
  6. Step 6: Final answer
    x = 208,813.07

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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.