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Finding the Fourth Proportional to 386,846.40, 533,812.32 and 217,049.28

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Solution

The fourth proportional to 386,846.40, 533,812.32 and 217,049.28 is: 299,507.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,846.40 : 533,812.32 = 217,049.28 : x
  2. Step 2: Convert to fraction form
    386,846.40/533,812.32 = 217,049.28/x
  3. Step 3: Cross multiply
    386,846.40x = 533,812.32 × 217,049.28
  4. Step 4: Simplify right side
    386,846.40x = 115,863,579,711.13
  5. Step 5: Solve for x
    x = 115,863,579,711.13/386,846.40
  6. Step 6: Final answer
    x = 299,507.97

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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.