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Finding the Fourth Proportional to 210,621.80, 315,318.30 and 204,477.80

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Solution

The fourth proportional to 210,621.80, 315,318.30 and 204,477.80 is: 306,120.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,621.80 : 315,318.30 = 204,477.80 : x
  2. Step 2: Convert to fraction form
    210,621.80/315,318.30 = 204,477.80/x
  3. Step 3: Cross multiply
    210,621.80x = 315,318.30 × 204,477.80
  4. Step 4: Simplify right side
    210,621.80x = 64,475,592,283.74
  5. Step 5: Solve for x
    x = 64,475,592,283.74/210,621.80
  6. Step 6: Final answer
    x = 306,120.22

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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.