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Finding the Fourth Proportional to 280,064.33, 386,378.75 and 172,447.73

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Solution

The fourth proportional to 280,064.33, 386,378.75 and 172,447.73 is: 237,910.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,064.33 : 386,378.75 = 172,447.73 : x
  2. Step 2: Convert to fraction form
    280,064.33/386,378.75 = 172,447.73/x
  3. Step 3: Cross multiply
    280,064.33x = 386,378.75 × 172,447.73
  4. Step 4: Simplify right side
    280,064.33x = 66,630,137,495.50
  5. Step 5: Solve for x
    x = 66,630,137,495.50/280,064.33
  6. Step 6: Final answer
    x = 237,910.12

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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.