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Finding the Fourth Proportional to 421,636.39, 581,853.48 and 230,647.50

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Solution

The fourth proportional to 421,636.39, 581,853.48 and 230,647.50 is: 318,290.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,636.39 : 581,853.48 = 230,647.50 : x
  2. Step 2: Convert to fraction form
    421,636.39/581,853.48 = 230,647.50/x
  3. Step 3: Cross multiply
    421,636.39x = 581,853.48 × 230,647.50
  4. Step 4: Simplify right side
    421,636.39x = 134,203,049,663.37
  5. Step 5: Solve for x
    x = 134,203,049,663.37/421,636.39
  6. Step 6: Final answer
    x = 318,290.96

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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.