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Finding the Fourth Proportional to 1,914.20, 2,870.66 and 744.12

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Solution

The fourth proportional to 1,914.20, 2,870.66 and 744.12 is: 1,115.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.20 : 2,870.66 = 744.12 : x
  2. Step 2: Convert to fraction form
    1,914.20/2,870.66 = 744.12/x
  3. Step 3: Cross multiply
    1,914.20x = 2,870.66 × 744.12
  4. Step 4: Simplify right side
    1,914.20x = 2,136,115.52
  5. Step 5: Solve for x
    x = 2,136,115.52/1,914.20
  6. Step 6: Final answer
    x = 1,115.93

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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.