Home / 280,421.76-387,026.46-178,340.79

Finding the Fourth Proportional to 280,421.76, 387,026.46 and 178,340.79

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Solution

The fourth proportional to 280,421.76, 387,026.46 and 178,340.79 is: 246,138.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,421.76 : 387,026.46 = 178,340.79 : x
  2. Step 2: Convert to fraction form
    280,421.76/387,026.46 = 178,340.79/x
  3. Step 3: Cross multiply
    280,421.76x = 387,026.46 × 178,340.79
  4. Step 4: Simplify right side
    280,421.76x = 69,022,604,627.30
  5. Step 5: Solve for x
    x = 69,022,604,627.30/280,421.76
  6. Step 6: Final answer
    x = 246,138.55

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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.