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Finding the Fourth Proportional to 253,998.82, 380,731.53 and 85,460.64

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Solution

The fourth proportional to 253,998.82, 380,731.53 and 85,460.64 is: 128,101.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,998.82 : 380,731.53 = 85,460.64 : x
  2. Step 2: Convert to fraction form
    253,998.82/380,731.53 = 85,460.64/x
  3. Step 3: Cross multiply
    253,998.82x = 380,731.53 × 85,460.64
  4. Step 4: Simplify right side
    253,998.82x = 32,537,559,668.35
  5. Step 5: Solve for x
    x = 32,537,559,668.35/253,998.82
  6. Step 6: Final answer
    x = 128,101.22

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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.