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Finding the Fourth Proportional to 1,987.66, 2,743.23 and 1,358.83

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Solution

The fourth proportional to 1,987.66, 2,743.23 and 1,358.83 is: 1,875.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.66 : 2,743.23 = 1,358.83 : x
  2. Step 2: Convert to fraction form
    1,987.66/2,743.23 = 1,358.83/x
  3. Step 3: Cross multiply
    1,987.66x = 2,743.23 × 1,358.83
  4. Step 4: Simplify right side
    1,987.66x = 3,727,583.22
  5. Step 5: Solve for x
    x = 3,727,583.22/1,987.66
  6. Step 6: Final answer
    x = 1,875.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.