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Finding the Fourth Proportional to 1,922.93, 2,882.66 and 690.05

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Solution

The fourth proportional to 1,922.93, 2,882.66 and 690.05 is: 1,034.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,922.93 : 2,882.66 = 690.05 : x
  2. Step 2: Convert to fraction form
    1,922.93/2,882.66 = 690.05/x
  3. Step 3: Cross multiply
    1,922.93x = 2,882.66 × 690.05
  4. Step 4: Simplify right side
    1,922.93x = 1,989,161.67
  5. Step 5: Solve for x
    x = 1,989,161.67/1,922.93
  6. Step 6: Final answer
    x = 1,034.45

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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.