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Finding the Fourth Proportional to 206,989.40, 310,484.10 and 206,989.40

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Solution

The fourth proportional to 206,989.40, 310,484.10 and 206,989.40 is: 310,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,989.40 : 310,484.10 = 206,989.40 : x
  2. Step 2: Convert to fraction form
    206,989.40/310,484.10 = 206,989.40/x
  3. Step 3: Cross multiply
    206,989.40x = 310,484.10 × 206,989.40
  4. Step 4: Simplify right side
    206,989.40x = 64,266,917,568.54
  5. Step 5: Solve for x
    x = 64,266,917,568.54/206,989.40
  6. Step 6: Final answer
    x = 310,484.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.