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Finding the Fourth Proportional to 280,364.92, 420,116.74 and 190,290.59

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Solution

The fourth proportional to 280,364.92, 420,116.74 and 190,290.59 is: 285,143.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,364.92 : 420,116.74 = 190,290.59 : x
  2. Step 2: Convert to fraction form
    280,364.92/420,116.74 = 190,290.59/x
  3. Step 3: Cross multiply
    280,364.92x = 420,116.74 × 190,290.59
  4. Step 4: Simplify right side
    280,364.92x = 79,944,262,323.48
  5. Step 5: Solve for x
    x = 79,944,262,323.48/280,364.92
  6. Step 6: Final answer
    x = 285,143.60

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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.