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Finding the Fourth Proportional to 280,007.32, 420,003.42 and 90,467.32

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Solution

The fourth proportional to 280,007.32, 420,003.42 and 90,467.32 is: 135,698.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,007.32 : 420,003.42 = 90,467.32 : x
  2. Step 2: Convert to fraction form
    280,007.32/420,003.42 = 90,467.32/x
  3. Step 3: Cross multiply
    280,007.32x = 420,003.42 × 90,467.32
  4. Step 4: Simplify right side
    280,007.32x = 37,996,583,798.23
  5. Step 5: Solve for x
    x = 37,996,583,798.23/280,007.32
  6. Step 6: Final answer
    x = 135,698.54

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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.