Home / 280,632.45-420,686.25-103,091.79

Finding the Fourth Proportional to 280,632.45, 420,686.25 and 103,091.79

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Solution

The fourth proportional to 280,632.45, 420,686.25 and 103,091.79 is: 154,541.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,632.45 : 420,686.25 = 103,091.79 : x
  2. Step 2: Convert to fraction form
    280,632.45/420,686.25 = 103,091.79/x
  3. Step 3: Cross multiply
    280,632.45x = 420,686.25 × 103,091.79
  4. Step 4: Simplify right side
    280,632.45x = 43,369,298,540.89
  5. Step 5: Solve for x
    x = 43,369,298,540.89/280,632.45
  6. Step 6: Final answer
    x = 154,541.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.