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Finding the Fourth Proportional to 253,259.51, 379,889.90 and 103,499.78

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Solution

The fourth proportional to 253,259.51, 379,889.90 and 103,499.78 is: 155,249.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,259.51 : 379,889.90 = 103,499.78 : x
  2. Step 2: Convert to fraction form
    253,259.51/379,889.90 = 103,499.78/x
  3. Step 3: Cross multiply
    253,259.51x = 379,889.90 × 103,499.78
  4. Step 4: Simplify right side
    253,259.51x = 39,318,519,045.40
  5. Step 5: Solve for x
    x = 39,318,519,045.40/253,259.51
  6. Step 6: Final answer
    x = 155,249.92

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Double scale
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Similar ratio
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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.