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Finding the Fourth Proportional to 1,207.07, 1,808.51 and 659.63

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Solution

The fourth proportional to 1,207.07, 1,808.51 and 659.63 is: 988.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.07 : 1,808.51 = 659.63 : x
  2. Step 2: Convert to fraction form
    1,207.07/1,808.51 = 659.63/x
  3. Step 3: Cross multiply
    1,207.07x = 1,808.51 × 659.63
  4. Step 4: Simplify right side
    1,207.07x = 1,192,953.62
  5. Step 5: Solve for x
    x = 1,192,953.62/1,207.07
  6. Step 6: Final answer
    x = 988.31

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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.