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Finding the Fourth Proportional to 1,207.50, 1,809.89 and 556.89

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Solution

The fourth proportional to 1,207.50, 1,809.89 and 556.89 is: 834.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.50 : 1,809.89 = 556.89 : x
  2. Step 2: Convert to fraction form
    1,207.50/1,809.89 = 556.89/x
  3. Step 3: Cross multiply
    1,207.50x = 1,809.89 × 556.89
  4. Step 4: Simplify right side
    1,207.50x = 1,007,906.86
  5. Step 5: Solve for x
    x = 1,007,906.86/1,207.50
  6. Step 6: Final answer
    x = 834.71

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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.