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Finding the Fourth Proportional to 253,858.46, 380,689.27 and 135,465.21

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Solution

The fourth proportional to 253,858.46, 380,689.27 and 135,465.21 is: 203,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,858.46 : 380,689.27 = 135,465.21 : x
  2. Step 2: Convert to fraction form
    253,858.46/380,689.27 = 135,465.21/x
  3. Step 3: Cross multiply
    253,858.46x = 380,689.27 × 135,465.21
  4. Step 4: Simplify right side
    253,858.46x = 51,570,151,566.63
  5. Step 5: Solve for x
    x = 51,570,151,566.63/253,858.46
  6. Step 6: Final answer
    x = 203,145.30

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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.