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Finding the Fourth Proportional to 1,988.89, 2,742.06 and 1,712.10

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Solution

The fourth proportional to 1,988.89, 2,742.06 and 1,712.10 is: 2,360.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.89 : 2,742.06 = 1,712.10 : x
  2. Step 2: Convert to fraction form
    1,988.89/2,742.06 = 1,712.10/x
  3. Step 3: Cross multiply
    1,988.89x = 2,742.06 × 1,712.10
  4. Step 4: Simplify right side
    1,988.89x = 4,694,680.93
  5. Step 5: Solve for x
    x = 4,694,680.93/1,988.89
  6. Step 6: Final answer
    x = 2,360.45

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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.