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Finding the Fourth Proportional to 208,570.20, 312,855.30 and 200,405.40

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Solution

The fourth proportional to 208,570.20, 312,855.30 and 200,405.40 is: 300,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,570.20 : 312,855.30 = 200,405.40 : x
  2. Step 2: Convert to fraction form
    208,570.20/312,855.30 = 200,405.40/x
  3. Step 3: Cross multiply
    208,570.20x = 312,855.30 × 200,405.40
  4. Step 4: Simplify right side
    208,570.20x = 62,697,891,538.62
  5. Step 5: Solve for x
    x = 62,697,891,538.62/208,570.20
  6. Step 6: Final answer
    x = 300,608.10

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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.