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Finding the Fourth Proportional to 280,211.91, 386,653.40 and 159,339.81

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Solution

The fourth proportional to 280,211.91, 386,653.40 and 159,339.81 is: 219,866.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,211.91 : 386,653.40 = 159,339.81 : x
  2. Step 2: Convert to fraction form
    280,211.91/386,653.40 = 159,339.81/x
  3. Step 3: Cross multiply
    280,211.91x = 386,653.40 × 159,339.81
  4. Step 4: Simplify right side
    280,211.91x = 61,609,278,367.70
  5. Step 5: Solve for x
    x = 61,609,278,367.70/280,211.91
  6. Step 6: Final answer
    x = 219,866.74

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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.