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Finding the Fourth Proportional to 1,536.60, 2,305.05 and 611.95

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Solution

The fourth proportional to 1,536.60, 2,305.05 and 611.95 is: 917.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.60 : 2,305.05 = 611.95 : x
  2. Step 2: Convert to fraction form
    1,536.60/2,305.05 = 611.95/x
  3. Step 3: Cross multiply
    1,536.60x = 2,305.05 × 611.95
  4. Step 4: Simplify right side
    1,536.60x = 1,410,560.76
  5. Step 5: Solve for x
    x = 1,410,560.76/1,536.60
  6. Step 6: Final answer
    x = 917.98

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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.