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Finding the Fourth Proportional to 280,012.40, 420,018.60 and 159,946.10

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Solution

The fourth proportional to 280,012.40, 420,018.60 and 159,946.10 is: 239,919.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,012.40 : 420,018.60 = 159,946.10 : x
  2. Step 2: Convert to fraction form
    280,012.40/420,018.60 = 159,946.10/x
  3. Step 3: Cross multiply
    280,012.40x = 420,018.60 × 159,946.10
  4. Step 4: Simplify right side
    280,012.40x = 67,180,336,997.46
  5. Step 5: Solve for x
    x = 67,180,336,997.46/280,012.40
  6. Step 6: Final answer
    x = 239,919.15

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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.