Home / 485,467.91-669,917.28-278,688.04

Finding the Fourth Proportional to 485,467.91, 669,917.28 and 278,688.04

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Solution

The fourth proportional to 485,467.91, 669,917.28 and 278,688.04 is: 384,573.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,467.91 : 669,917.28 = 278,688.04 : x
  2. Step 2: Convert to fraction form
    485,467.91/669,917.28 = 278,688.04/x
  3. Step 3: Cross multiply
    485,467.91x = 669,917.28 × 278,688.04
  4. Step 4: Simplify right side
    485,467.91x = 186,697,936,863.90
  5. Step 5: Solve for x
    x = 186,697,936,863.90/485,467.91
  6. Step 6: Final answer
    x = 384,573.18

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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.