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Finding the Fourth Proportional to 2,797.18, 3,860.18 and 1,678.16

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Solution

The fourth proportional to 2,797.18, 3,860.18 and 1,678.16 is: 2,315.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,797.18 : 3,860.18 = 1,678.16 : x
  2. Step 2: Convert to fraction form
    2,797.18/3,860.18 = 1,678.16/x
  3. Step 3: Cross multiply
    2,797.18x = 3,860.18 × 1,678.16
  4. Step 4: Simplify right side
    2,797.18x = 6,477,999.67
  5. Step 5: Solve for x
    x = 6,477,999.67/2,797.18
  6. Step 6: Final answer
    x = 2,315.90

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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.