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Finding the Fourth Proportional to 288,690.52, 398,376.80 and 159,621.55

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Solution

The fourth proportional to 288,690.52, 398,376.80 and 159,621.55 is: 220,268.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,690.52 : 398,376.80 = 159,621.55 : x
  2. Step 2: Convert to fraction form
    288,690.52/398,376.80 = 159,621.55/x
  3. Step 3: Cross multiply
    288,690.52x = 398,376.80 × 159,621.55
  4. Step 4: Simplify right side
    288,690.52x = 63,589,522,300.04
  5. Step 5: Solve for x
    x = 63,589,522,300.04/288,690.52
  6. Step 6: Final answer
    x = 220,268.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.