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Finding the Fourth Proportional to 2,646.12, 3,968.76 and 698.46

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Solution

The fourth proportional to 2,646.12, 3,968.76 and 698.46 is: 1,047.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,646.12 : 3,968.76 = 698.46 : x
  2. Step 2: Convert to fraction form
    2,646.12/3,968.76 = 698.46/x
  3. Step 3: Cross multiply
    2,646.12x = 3,968.76 × 698.46
  4. Step 4: Simplify right side
    2,646.12x = 2,772,020.11
  5. Step 5: Solve for x
    x = 2,772,020.11/2,646.12
  6. Step 6: Final answer
    x = 1,047.58

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1.5x scale

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.