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Finding the Fourth Proportional to 280,280.59, 420,170.89 and 102,746.15

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Solution

The fourth proportional to 280,280.59, 420,170.89 and 102,746.15 is: 154,027.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,280.59 : 420,170.89 = 102,746.15 : x
  2. Step 2: Convert to fraction form
    280,280.59/420,170.89 = 102,746.15/x
  3. Step 3: Cross multiply
    280,280.59x = 420,170.89 × 102,746.15
  4. Step 4: Simplify right side
    280,280.59x = 43,170,940,775.84
  5. Step 5: Solve for x
    x = 43,170,940,775.84/280,280.59
  6. Step 6: Final answer
    x = 154,027.58

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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.