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Finding the Fourth Proportional to 278,715.45, 384,786.92 and 183,498.94

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Solution

The fourth proportional to 278,715.45, 384,786.92 and 183,498.94 is: 253,333.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,715.45 : 384,786.92 = 183,498.94 : x
  2. Step 2: Convert to fraction form
    278,715.45/384,786.92 = 183,498.94/x
  3. Step 3: Cross multiply
    278,715.45x = 384,786.92 × 183,498.94
  4. Step 4: Simplify right side
    278,715.45x = 70,607,990,066.40
  5. Step 5: Solve for x
    x = 70,607,990,066.40/278,715.45
  6. Step 6: Final answer
    x = 253,333.61

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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.