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Finding the Fourth Proportional to 1,019.20, 1,406.61 and 704.37

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Solution

The fourth proportional to 1,019.20, 1,406.61 and 704.37 is: 972.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019.20 : 1,406.61 = 704.37 : x
  2. Step 2: Convert to fraction form
    1,019.20/1,406.61 = 704.37/x
  3. Step 3: Cross multiply
    1,019.20x = 1,406.61 × 704.37
  4. Step 4: Simplify right side
    1,019.20x = 990,766.85
  5. Step 5: Solve for x
    x = 990,766.85/1,019.20
  6. Step 6: Final answer
    x = 972.10

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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.