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Finding the Fourth Proportional to 1,671.64, 2,518.74 and 1,385.50

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Solution

The fourth proportional to 1,671.64, 2,518.74 and 1,385.50 is: 2,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,671.64 : 2,518.74 = 1,385.50 : x
  2. Step 2: Convert to fraction form
    1,671.64/2,518.74 = 1,385.50/x
  3. Step 3: Cross multiply
    1,671.64x = 2,518.74 × 1,385.50
  4. Step 4: Simplify right side
    1,671.64x = 3,489,714.27
  5. Step 5: Solve for x
    x = 3,489,714.27/1,671.64
  6. Step 6: Final answer
    x = 2,087.60

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.