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Finding the Fourth Proportional to 405,900.48, 609,025.76 and 218,868.80

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Solution

The fourth proportional to 405,900.48, 609,025.76 and 218,868.80 is: 328,397.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,900.48 : 609,025.76 = 218,868.80 : x
  2. Step 2: Convert to fraction form
    405,900.48/609,025.76 = 218,868.80/x
  3. Step 3: Cross multiply
    405,900.48x = 609,025.76 × 218,868.80
  4. Step 4: Simplify right side
    405,900.48x = 133,296,737,260.29
  5. Step 5: Solve for x
    x = 133,296,737,260.29/405,900.48
  6. Step 6: Final answer
    x = 328,397.58

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1.5x scale

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.