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Finding the Fourth Proportional to 280,038.60, 420,057.90 and 269,152.20

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Solution

The fourth proportional to 280,038.60, 420,057.90 and 269,152.20 is: 403,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,038.60 : 420,057.90 = 269,152.20 : x
  2. Step 2: Convert to fraction form
    280,038.60/420,057.90 = 269,152.20/x
  3. Step 3: Cross multiply
    280,038.60x = 420,057.90 × 269,152.20
  4. Step 4: Simplify right side
    280,038.60x = 113,059,507,912.38
  5. Step 5: Solve for x
    x = 113,059,507,912.38/280,038.60
  6. Step 6: Final answer
    x = 403,728.30

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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.