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Finding the Fourth Proportional to 1,657.47, 2,486.21 and 836.44

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Solution

The fourth proportional to 1,657.47, 2,486.21 and 836.44 is: 1,254.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.47 : 2,486.21 = 836.44 : x
  2. Step 2: Convert to fraction form
    1,657.47/2,486.21 = 836.44/x
  3. Step 3: Cross multiply
    1,657.47x = 2,486.21 × 836.44
  4. Step 4: Simplify right side
    1,657.47x = 2,079,565.49
  5. Step 5: Solve for x
    x = 2,079,565.49/1,657.47
  6. Step 6: Final answer
    x = 1,254.66

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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.