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Finding the Fourth Proportional to 407,519.70, 611,279.55 and 107,999.70

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Solution

The fourth proportional to 407,519.70, 611,279.55 and 107,999.70 is: 161,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,519.70 : 611,279.55 = 107,999.70 : x
  2. Step 2: Convert to fraction form
    407,519.70/611,279.55 = 107,999.70/x
  3. Step 3: Cross multiply
    407,519.70x = 611,279.55 × 107,999.70
  4. Step 4: Simplify right side
    407,519.70x = 66,018,008,016.14
  5. Step 5: Solve for x
    x = 66,018,008,016.14/407,519.70
  6. Step 6: Final answer
    x = 161,999.55

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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.