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Finding the Fourth Proportional to 346,940.84, 478,776.48 and 193,979

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Solution

The fourth proportional to 346,940.84, 478,776.48 and 193,979 is: 267,689.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,940.84 : 478,776.48 = 193,979 : x
  2. Step 2: Convert to fraction form
    346,940.84/478,776.48 = 193,979/x
  3. Step 3: Cross multiply
    346,940.84x = 478,776.48 × 193,979
  4. Step 4: Simplify right side
    346,940.84x = 92,872,582,813.92
  5. Step 5: Solve for x
    x = 92,872,582,813.92/346,940.84
  6. Step 6: Final answer
    x = 267,689.97

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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.