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

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Solution

The fourth proportional to 208,605.70, 312,908.55 and 208,605.70 is: 312,908.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,605.70 : 312,908.55 = 208,605.70 : x
  2. Step 2: Convert to fraction form
    208,605.70/312,908.55 = 208,605.70/x
  3. Step 3: Cross multiply
    208,605.70x = 312,908.55 × 208,605.70
  4. Step 4: Simplify right side
    208,605.70x = 65,274,507,108.74
  5. Step 5: Solve for x
    x = 65,274,507,108.74/208,605.70
  6. Step 6: Final answer
    x = 312,908.55

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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.