Home / 280,144.16-386,631.12-155,977.76

Finding the Fourth Proportional to 280,144.16, 386,631.12 and 155,977.76

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Solution

The fourth proportional to 280,144.16, 386,631.12 and 155,977.76 is: 215,267.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,144.16 : 386,631.12 = 155,977.76 : x
  2. Step 2: Convert to fraction form
    280,144.16/386,631.12 = 155,977.76/x
  3. Step 3: Cross multiply
    280,144.16x = 386,631.12 × 155,977.76
  4. Step 4: Simplify right side
    280,144.16x = 60,305,856,043.89
  5. Step 5: Solve for x
    x = 60,305,856,043.89/280,144.16
  6. Step 6: Final answer
    x = 215,267.23

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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.