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Finding the Fourth Proportional to 386,138.16, 532,885.08 and 216,366

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Solution

The fourth proportional to 386,138.16, 532,885.08 and 216,366 is: 298,593.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,138.16 : 532,885.08 = 216,366 : x
  2. Step 2: Convert to fraction form
    386,138.16/532,885.08 = 216,366/x
  3. Step 3: Cross multiply
    386,138.16x = 532,885.08 × 216,366
  4. Step 4: Simplify right side
    386,138.16x = 115,298,213,219.28
  5. Step 5: Solve for x
    x = 115,298,213,219.28/386,138.16
  6. Step 6: Final answer
    x = 298,593.16

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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.