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Finding the Fourth Proportional to 280,371.06, 386,910.90 and 153,046.80

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Solution

The fourth proportional to 280,371.06, 386,910.90 and 153,046.80 is: 211,203.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,371.06 : 386,910.90 = 153,046.80 : x
  2. Step 2: Convert to fraction form
    280,371.06/386,910.90 = 153,046.80/x
  3. Step 3: Cross multiply
    280,371.06x = 386,910.90 × 153,046.80
  4. Step 4: Simplify right side
    280,371.06x = 59,215,475,130.12
  5. Step 5: Solve for x
    x = 59,215,475,130.12/280,371.06
  6. Step 6: Final answer
    x = 211,203.95

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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.