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Finding the Fourth Proportional to 3,458.40, 5,187.65 and 993.30

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Solution

The fourth proportional to 3,458.40, 5,187.65 and 993.30 is: 1,489.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,458.40 : 5,187.65 = 993.30 : x
  2. Step 2: Convert to fraction form
    3,458.40/5,187.65 = 993.30/x
  3. Step 3: Cross multiply
    3,458.40x = 5,187.65 × 993.30
  4. Step 4: Simplify right side
    3,458.40x = 5,152,887.78
  5. Step 5: Solve for x
    x = 5,152,887.78/3,458.40
  6. Step 6: Final answer
    x = 1,489.96

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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.