Home / 1,981.60-2,985.80-1,642.48

Finding the Fourth Proportional to 1,981.60, 2,985.80 and 1,642.48

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Solution

The fourth proportional to 1,981.60, 2,985.80 and 1,642.48 is: 2,474.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.60 : 2,985.80 = 1,642.48 : x
  2. Step 2: Convert to fraction form
    1,981.60/2,985.80 = 1,642.48/x
  3. Step 3: Cross multiply
    1,981.60x = 2,985.80 × 1,642.48
  4. Step 4: Simplify right side
    1,981.60x = 4,904,116.78
  5. Step 5: Solve for x
    x = 4,904,116.78/1,981.60
  6. Step 6: Final answer
    x = 2,474.83

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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.