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Finding the Fourth Proportional to 280,071.78, 386,532.27 and 159,231.30

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Solution

The fourth proportional to 280,071.78, 386,532.27 and 159,231.30 is: 219,758.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,071.78 : 386,532.27 = 159,231.30 : x
  2. Step 2: Convert to fraction form
    280,071.78/386,532.27 = 159,231.30/x
  3. Step 3: Cross multiply
    280,071.78x = 386,532.27 × 159,231.30
  4. Step 4: Simplify right side
    280,071.78x = 61,548,035,844.05
  5. Step 5: Solve for x
    x = 61,548,035,844.05/280,071.78
  6. Step 6: Final answer
    x = 219,758.08

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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.