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Finding the Fourth Proportional to 280,362.92, 420,113.74 and 190,288.59

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Solution

The fourth proportional to 280,362.92, 420,113.74 and 190,288.59 is: 285,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,362.92 : 420,113.74 = 190,288.59 : x
  2. Step 2: Convert to fraction form
    280,362.92/420,113.74 = 190,288.59/x
  3. Step 3: Cross multiply
    280,362.92x = 420,113.74 × 190,288.59
  4. Step 4: Simplify right side
    280,362.92x = 79,942,851,893.01
  5. Step 5: Solve for x
    x = 79,942,851,893.01/280,362.92
  6. Step 6: Final answer
    x = 285,140.60

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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.