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Finding the Fourth Proportional to 287,073.66, 396,231.95 and 222,415

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Solution

The fourth proportional to 287,073.66, 396,231.95 and 222,415 is: 306,987.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,073.66 : 396,231.95 = 222,415 : x
  2. Step 2: Convert to fraction form
    287,073.66/396,231.95 = 222,415/x
  3. Step 3: Cross multiply
    287,073.66x = 396,231.95 × 222,415
  4. Step 4: Simplify right side
    287,073.66x = 88,127,929,159.25
  5. Step 5: Solve for x
    x = 88,127,929,159.25/287,073.66
  6. Step 6: Final answer
    x = 306,987.17

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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.