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Finding the Fourth Proportional to 253,817.79, 380,458.77 and 85,178.22

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Solution

The fourth proportional to 253,817.79, 380,458.77 and 85,178.22 is: 127,677.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,817.79 : 380,458.77 = 85,178.22 : x
  2. Step 2: Convert to fraction form
    253,817.79/380,458.77 = 85,178.22/x
  3. Step 3: Cross multiply
    253,817.79x = 380,458.77 × 85,178.22
  4. Step 4: Simplify right side
    253,817.79x = 32,406,800,811.99
  5. Step 5: Solve for x
    x = 32,406,800,811.99/253,817.79
  6. Step 6: Final answer
    x = 127,677.42

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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.