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Finding the Fourth Proportional to 208,605.70, 312,908.55 and 200,440.90

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Solution

The fourth proportional to 208,605.70, 312,908.55 and 200,440.90 is: 300,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,605.70 : 312,908.55 = 200,440.90 : x
  2. Step 2: Convert to fraction form
    208,605.70/312,908.55 = 200,440.90/x
  3. Step 3: Cross multiply
    208,605.70x = 312,908.55 × 200,440.90
  4. Step 4: Simplify right side
    208,605.70x = 62,719,671,379.70
  5. Step 5: Solve for x
    x = 62,719,671,379.70/208,605.70
  6. Step 6: Final answer
    x = 300,661.35

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1.5x scale

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.