Home / 280,239.20-386,739.42-152,921.78

Finding the Fourth Proportional to 280,239.20, 386,739.42 and 152,921.78

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Solution

The fourth proportional to 280,239.20, 386,739.42 and 152,921.78 is: 211,037.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,239.20 : 386,739.42 = 152,921.78 : x
  2. Step 2: Convert to fraction form
    280,239.20/386,739.42 = 152,921.78/x
  3. Step 3: Cross multiply
    280,239.20x = 386,739.42 × 152,921.78
  4. Step 4: Simplify right side
    280,239.20x = 59,140,880,502.57
  5. Step 5: Solve for x
    x = 59,140,880,502.57/280,239.20
  6. Step 6: Final answer
    x = 211,037.14

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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.