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Finding the Fourth Proportional to 405,009.20, 607,513.80 and 330,213.80

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Solution

The fourth proportional to 405,009.20, 607,513.80 and 330,213.80 is: 495,320.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,009.20 : 607,513.80 = 330,213.80 : x
  2. Step 2: Convert to fraction form
    405,009.20/607,513.80 = 330,213.80/x
  3. Step 3: Cross multiply
    405,009.20x = 607,513.80 × 330,213.80
  4. Step 4: Simplify right side
    405,009.20x = 200,609,440,450.44
  5. Step 5: Solve for x
    x = 200,609,440,450.44/405,009.20
  6. Step 6: Final answer
    x = 495,320.70

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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.