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Finding the Fourth Proportional to 280,904.70, 421,463.43 and 168,663.36

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Solution

The fourth proportional to 280,904.70, 421,463.43 and 168,663.36 is: 253,058.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,904.70 : 421,463.43 = 168,663.36 : x
  2. Step 2: Convert to fraction form
    280,904.70/421,463.43 = 168,663.36/x
  3. Step 3: Cross multiply
    280,904.70x = 421,463.43 × 168,663.36
  4. Step 4: Simplify right side
    280,904.70x = 71,085,438,220.92
  5. Step 5: Solve for x
    x = 71,085,438,220.92/280,904.70
  6. Step 6: Final answer
    x = 253,058.91

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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.