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Finding the Fourth Proportional to 5,281.88, 7,920.14 and 1,770.66

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Solution

The fourth proportional to 5,281.88, 7,920.14 and 1,770.66 is: 2,655.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.88 : 7,920.14 = 1,770.66 : x
  2. Step 2: Convert to fraction form
    5,281.88/7,920.14 = 1,770.66/x
  3. Step 3: Cross multiply
    5,281.88x = 7,920.14 × 1,770.66
  4. Step 4: Simplify right side
    5,281.88x = 14,023,875.09
  5. Step 5: Solve for x
    x = 14,023,875.09/5,281.88
  6. Step 6: Final answer
    x = 2,655.09

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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.