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Finding the Fourth Proportional to 2,720.06, 4,080.70 and 988.69

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Solution

The fourth proportional to 2,720.06, 4,080.70 and 988.69 is: 1,483.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.06 : 4,080.70 = 988.69 : x
  2. Step 2: Convert to fraction form
    2,720.06/4,080.70 = 988.69/x
  3. Step 3: Cross multiply
    2,720.06x = 4,080.70 × 988.69
  4. Step 4: Simplify right side
    2,720.06x = 4,034,547.28
  5. Step 5: Solve for x
    x = 4,034,547.28/2,720.06
  6. Step 6: Final answer
    x = 1,483.26

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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.