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Finding the Fourth Proportional to 280,659.40, 422,025.90 and 235,040.20

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Solution

The fourth proportional to 280,659.40, 422,025.90 and 235,040.20 is: 353,428.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,659.40 : 422,025.90 = 235,040.20 : x
  2. Step 2: Convert to fraction form
    280,659.40/422,025.90 = 235,040.20/x
  3. Step 3: Cross multiply
    280,659.40x = 422,025.90 × 235,040.20
  4. Step 4: Simplify right side
    280,659.40x = 99,193,051,941.18
  5. Step 5: Solve for x
    x = 99,193,051,941.18/280,659.40
  6. Step 6: Final answer
    x = 353,428.58

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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.