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Finding the Fourth Proportional to 274,045.78, 378,156.60 and 172,038.63

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Solution

The fourth proportional to 274,045.78, 378,156.60 and 172,038.63 is: 237,396.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,045.78 : 378,156.60 = 172,038.63 : x
  2. Step 2: Convert to fraction form
    274,045.78/378,156.60 = 172,038.63/x
  3. Step 3: Cross multiply
    274,045.78x = 378,156.60 × 172,038.63
  4. Step 4: Simplify right side
    274,045.78x = 65,057,544,807.55
  5. Step 5: Solve for x
    x = 65,057,544,807.55/274,045.78
  6. Step 6: Final answer
    x = 237,396.63

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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.