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Finding the Fourth Proportional to 210,620.10, 315,930.15 and 192,905.40

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Solution

The fourth proportional to 210,620.10, 315,930.15 and 192,905.40 is: 289,358.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,620.10 : 315,930.15 = 192,905.40 : x
  2. Step 2: Convert to fraction form
    210,620.10/315,930.15 = 192,905.40/x
  3. Step 3: Cross multiply
    210,620.10x = 315,930.15 × 192,905.40
  4. Step 4: Simplify right side
    210,620.10x = 60,944,631,957.81
  5. Step 5: Solve for x
    x = 60,944,631,957.81/210,620.10
  6. Step 6: Final answer
    x = 289,358.10

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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.