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Finding the Fourth Proportional to 407,479.99, 611,081.56 and 141,178.33

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Solution

The fourth proportional to 407,479.99, 611,081.56 and 141,178.33 is: 211,719.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,479.99 : 611,081.56 = 141,178.33 : x
  2. Step 2: Convert to fraction form
    407,479.99/611,081.56 = 141,178.33/x
  3. Step 3: Cross multiply
    407,479.99x = 611,081.56 × 141,178.33
  4. Step 4: Simplify right side
    407,479.99x = 86,271,474,134.59
  5. Step 5: Solve for x
    x = 86,271,474,134.59/407,479.99
  6. Step 6: Final answer
    x = 211,719.54

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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.