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Finding the Fourth Proportional to 3,465.81, 5,198.72 and 868.74

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Solution

The fourth proportional to 3,465.81, 5,198.72 and 868.74 is: 1,303.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,465.81 : 5,198.72 = 868.74 : x
  2. Step 2: Convert to fraction form
    3,465.81/5,198.72 = 868.74/x
  3. Step 3: Cross multiply
    3,465.81x = 5,198.72 × 868.74
  4. Step 4: Simplify right side
    3,465.81x = 4,516,331.67
  5. Step 5: Solve for x
    x = 4,516,331.67/3,465.81
  6. Step 6: Final answer
    x = 1,303.11

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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.