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Finding the Fourth Proportional to 1,235.10, 1,704.39 and 711.06

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Solution

The fourth proportional to 1,235.10, 1,704.39 and 711.06 is: 981.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.10 : 1,704.39 = 711.06 : x
  2. Step 2: Convert to fraction form
    1,235.10/1,704.39 = 711.06/x
  3. Step 3: Cross multiply
    1,235.10x = 1,704.39 × 711.06
  4. Step 4: Simplify right side
    1,235.10x = 1,211,923.55
  5. Step 5: Solve for x
    x = 1,211,923.55/1,235.10
  6. Step 6: Final answer
    x = 981.24

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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.