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Finding the Fourth Proportional to 2,168.84, 2,986.76 and 2,070.40

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Solution

The fourth proportional to 2,168.84, 2,986.76 and 2,070.40 is: 2,851.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,168.84 : 2,986.76 = 2,070.40 : x
  2. Step 2: Convert to fraction form
    2,168.84/2,986.76 = 2,070.40/x
  3. Step 3: Cross multiply
    2,168.84x = 2,986.76 × 2,070.40
  4. Step 4: Simplify right side
    2,168.84x = 6,183,787.90
  5. Step 5: Solve for x
    x = 6,183,787.90/2,168.84
  6. Step 6: Final answer
    x = 2,851.20

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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.