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Finding the Fourth Proportional to 280,080.30, 420,120.45 and 280,080.30

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Solution

The fourth proportional to 280,080.30, 420,120.45 and 280,080.30 is: 420,120.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,080.30 : 420,120.45 = 280,080.30 : x
  2. Step 2: Convert to fraction form
    280,080.30/420,120.45 = 280,080.30/x
  3. Step 3: Cross multiply
    280,080.30x = 420,120.45 × 280,080.30
  4. Step 4: Simplify right side
    280,080.30x = 117,667,461,672.14
  5. Step 5: Solve for x
    x = 117,667,461,672.14/280,080.30
  6. Step 6: Final answer
    x = 420,120.45

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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.