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Finding the Fourth Proportional to 420,030.60, 631,601.10 and 351,601.80

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Solution

The fourth proportional to 420,030.60, 631,601.10 and 351,601.80 is: 528,704.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,030.60 : 631,601.10 = 351,601.80 : x
  2. Step 2: Convert to fraction form
    420,030.60/631,601.10 = 351,601.80/x
  3. Step 3: Cross multiply
    420,030.60x = 631,601.10 × 351,601.80
  4. Step 4: Simplify right side
    420,030.60x = 222,072,083,641.98
  5. Step 5: Solve for x
    x = 222,072,083,641.98/420,030.60
  6. Step 6: Final answer
    x = 528,704.54

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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.