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Finding the Fourth Proportional to 280,394.88, 386,942.88 and 153,070.44

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Solution

The fourth proportional to 280,394.88, 386,942.88 and 153,070.44 is: 211,236.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,394.88 : 386,942.88 = 153,070.44 : x
  2. Step 2: Convert to fraction form
    280,394.88/386,942.88 = 153,070.44/x
  3. Step 3: Cross multiply
    280,394.88x = 386,942.88 × 153,070.44
  4. Step 4: Simplify right side
    280,394.88x = 59,229,516,896.47
  5. Step 5: Solve for x
    x = 59,229,516,896.47/280,394.88
  6. Step 6: Final answer
    x = 211,236.09

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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.