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Finding the Fourth Proportional to 421,289.82, 581,238 and 239,873.44

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Solution

The fourth proportional to 421,289.82, 581,238 and 239,873.44 is: 330,944.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,289.82 : 581,238 = 239,873.44 : x
  2. Step 2: Convert to fraction form
    421,289.82/581,238 = 239,873.44/x
  3. Step 3: Cross multiply
    421,289.82x = 581,238 × 239,873.44
  4. Step 4: Simplify right side
    421,289.82x = 139,423,558,518.72
  5. Step 5: Solve for x
    x = 139,423,558,518.72/421,289.82
  6. Step 6: Final answer
    x = 330,944.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.