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Finding the Fourth Proportional to 280,874.49, 421,417.79 and 168,632.94

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Solution

The fourth proportional to 280,874.49, 421,417.79 and 168,632.94 is: 253,013.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,874.49 : 421,417.79 = 168,632.94 : x
  2. Step 2: Convert to fraction form
    280,874.49/421,417.79 = 168,632.94/x
  3. Step 3: Cross multiply
    280,874.49x = 421,417.79 × 168,632.94
  4. Step 4: Simplify right side
    280,874.49x = 71,064,919,895.05
  5. Step 5: Solve for x
    x = 71,064,919,895.05/280,874.49
  6. Step 6: Final answer
    x = 253,013.08

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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.