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Finding the Fourth Proportional to 3,891.54, 5,837.55 and 1,118.40

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Solution

The fourth proportional to 3,891.54, 5,837.55 and 1,118.40 is: 1,677.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.54 : 5,837.55 = 1,118.40 : x
  2. Step 2: Convert to fraction form
    3,891.54/5,837.55 = 1,118.40/x
  3. Step 3: Cross multiply
    3,891.54x = 5,837.55 × 1,118.40
  4. Step 4: Simplify right side
    3,891.54x = 6,528,715.92
  5. Step 5: Solve for x
    x = 6,528,715.92/3,891.54
  6. Step 6: Final answer
    x = 1,677.67

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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.