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Finding the Fourth Proportional to 1,988.84, 2,975.90 and 1,718.12

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Solution

The fourth proportional to 1,988.84, 2,975.90 and 1,718.12 is: 2,570.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.84 : 2,975.90 = 1,718.12 : x
  2. Step 2: Convert to fraction form
    1,988.84/2,975.90 = 1,718.12/x
  3. Step 3: Cross multiply
    1,988.84x = 2,975.90 × 1,718.12
  4. Step 4: Simplify right side
    1,988.84x = 5,112,953.31
  5. Step 5: Solve for x
    x = 5,112,953.31/1,988.84
  6. Step 6: Final answer
    x = 2,570.82

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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.