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Finding the Fourth Proportional to 2,458.92, 3,688.39 and 815.59

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Solution

The fourth proportional to 2,458.92, 3,688.39 and 815.59 is: 1,223.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,458.92 : 3,688.39 = 815.59 : x
  2. Step 2: Convert to fraction form
    2,458.92/3,688.39 = 815.59/x
  3. Step 3: Cross multiply
    2,458.92x = 3,688.39 × 815.59
  4. Step 4: Simplify right side
    2,458.92x = 3,008,225.42
  5. Step 5: Solve for x
    x = 3,008,225.42/2,458.92
  6. Step 6: Final answer
    x = 1,223.39

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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.