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Finding the Fourth Proportional to 347,425.30, 478,791.66 and 278,436.40

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Solution

The fourth proportional to 347,425.30, 478,791.66 and 278,436.40 is: 383,717.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,425.30 : 478,791.66 = 278,436.40 : x
  2. Step 2: Convert to fraction form
    347,425.30/478,791.66 = 278,436.40/x
  3. Step 3: Cross multiply
    347,425.30x = 478,791.66 × 278,436.40
  4. Step 4: Simplify right side
    347,425.30x = 133,313,026,160.42
  5. Step 5: Solve for x
    x = 133,313,026,160.42/347,425.30
  6. Step 6: Final answer
    x = 383,717.09

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1.5x scale

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.