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Finding the Fourth Proportional to 2,656.84, 3,985.44 and 709

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Solution

The fourth proportional to 2,656.84, 3,985.44 and 709 is: 1,063.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656.84 : 3,985.44 = 709 : x
  2. Step 2: Convert to fraction form
    2,656.84/3,985.44 = 709/x
  3. Step 3: Cross multiply
    2,656.84x = 3,985.44 × 709
  4. Step 4: Simplify right side
    2,656.84x = 2,825,676.96
  5. Step 5: Solve for x
    x = 2,825,676.96/2,656.84
  6. Step 6: Final answer
    x = 1,063.55

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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.