Home / 2,988.60-4,483.08-1,139.89

Finding the Fourth Proportional to 2,988.60, 4,483.08 and 1,139.89

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Solution

The fourth proportional to 2,988.60, 4,483.08 and 1,139.89 is: 1,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.60 : 4,483.08 = 1,139.89 : x
  2. Step 2: Convert to fraction form
    2,988.60/4,483.08 = 1,139.89/x
  3. Step 3: Cross multiply
    2,988.60x = 4,483.08 × 1,139.89
  4. Step 4: Simplify right side
    2,988.60x = 5,110,218.06
  5. Step 5: Solve for x
    x = 5,110,218.06/2,988.60
  6. Step 6: Final answer
    x = 1,709.90

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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.