Home / 1,988.15-2,987.60-1,064.34

Finding the Fourth Proportional to 1,988.15, 2,987.60 and 1,064.34

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Solution

The fourth proportional to 1,988.15, 2,987.60 and 1,064.34 is: 1,599.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.15 : 2,987.60 = 1,064.34 : x
  2. Step 2: Convert to fraction form
    1,988.15/2,987.60 = 1,064.34/x
  3. Step 3: Cross multiply
    1,988.15x = 2,987.60 × 1,064.34
  4. Step 4: Simplify right side
    1,988.15x = 3,179,816.86
  5. Step 5: Solve for x
    x = 3,179,816.86/1,988.15
  6. Step 6: Final answer
    x = 1,599.39

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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.