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Finding the Fourth Proportional to 421,001.50, 580,982.68 and 239,713.50

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Solution

The fourth proportional to 421,001.50, 580,982.68 and 239,713.50 is: 330,804.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,001.50 : 580,982.68 = 239,713.50 : x
  2. Step 2: Convert to fraction form
    421,001.50/580,982.68 = 239,713.50/x
  3. Step 3: Cross multiply
    421,001.50x = 580,982.68 × 239,713.50
  4. Step 4: Simplify right side
    421,001.50x = 139,269,391,662.18
  5. Step 5: Solve for x
    x = 139,269,391,662.18/421,001.50
  6. Step 6: Final answer
    x = 330,804.98

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1.5x scale

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.