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Finding the Fourth Proportional to 280,015.62, 420,024.93 and 69,653.58

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Solution

The fourth proportional to 280,015.62, 420,024.93 and 69,653.58 is: 104,480.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,015.62 : 420,024.93 = 69,653.58 : x
  2. Step 2: Convert to fraction form
    280,015.62/420,024.93 = 69,653.58/x
  3. Step 3: Cross multiply
    280,015.62x = 420,024.93 × 69,653.58
  4. Step 4: Simplify right side
    280,015.62x = 29,256,240,063.75
  5. Step 5: Solve for x
    x = 29,256,240,063.75/280,015.62
  6. Step 6: Final answer
    x = 104,480.74

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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.