Home / 280,845.63-387,343.89-212,164.11

Finding the Fourth Proportional to 280,845.63, 387,343.89 and 212,164.11

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Solution

The fourth proportional to 280,845.63, 387,343.89 and 212,164.11 is: 292,617.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,845.63 : 387,343.89 = 212,164.11 : x
  2. Step 2: Convert to fraction form
    280,845.63/387,343.89 = 212,164.11/x
  3. Step 3: Cross multiply
    280,845.63x = 387,343.89 × 212,164.11
  4. Step 4: Simplify right side
    280,845.63x = 82,180,471,685.79
  5. Step 5: Solve for x
    x = 82,180,471,685.79/280,845.63
  6. Step 6: Final answer
    x = 292,617.95

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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.