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Finding the Fourth Proportional to 878,187, 1,317,283.74 and 213,339

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Solution

The fourth proportional to 878,187, 1,317,283.74 and 213,339 is: 320,009.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,187 : 1,317,283.74 = 213,339 : x
  2. Step 2: Convert to fraction form
    878,187/1,317,283.74 = 213,339/x
  3. Step 3: Cross multiply
    878,187x = 1,317,283.74 × 213,339
  4. Step 4: Simplify right side
    878,187x = 281,027,995,807.86
  5. Step 5: Solve for x
    x = 281,027,995,807.86/878,187
  6. Step 6: Final answer
    x = 320,009.29

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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.