Home / 280,440.11-420,712.46-90,883.58

Finding the Fourth Proportional to 280,440.11, 420,712.46 and 90,883.58

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Solution

The fourth proportional to 280,440.11, 420,712.46 and 90,883.58 is: 136,342.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,440.11 : 420,712.46 = 90,883.58 : x
  2. Step 2: Convert to fraction form
    280,440.11/420,712.46 = 90,883.58/x
  3. Step 3: Cross multiply
    280,440.11x = 420,712.46 × 90,883.58
  4. Step 4: Simplify right side
    280,440.11x = 38,235,854,060.99
  5. Step 5: Solve for x
    x = 38,235,854,060.99/280,440.11
  6. Step 6: Final answer
    x = 136,342.32

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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.