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Finding the Fourth Proportional to 2,409.63, 3,611.21 and 948.39

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Solution

The fourth proportional to 2,409.63, 3,611.21 and 948.39 is: 1,421.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,409.63 : 3,611.21 = 948.39 : x
  2. Step 2: Convert to fraction form
    2,409.63/3,611.21 = 948.39/x
  3. Step 3: Cross multiply
    2,409.63x = 3,611.21 × 948.39
  4. Step 4: Simplify right side
    2,409.63x = 3,424,830.71
  5. Step 5: Solve for x
    x = 3,424,830.71/2,409.63
  6. Step 6: Final answer
    x = 1,421.31

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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.