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Finding the Fourth Proportional to 405,012.70, 607,519.05 and 330,217.30

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Solution

The fourth proportional to 405,012.70, 607,519.05 and 330,217.30 is: 495,325.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,012.70 : 607,519.05 = 330,217.30 : x
  2. Step 2: Convert to fraction form
    405,012.70/607,519.05 = 330,217.30/x
  3. Step 3: Cross multiply
    405,012.70x = 607,519.05 × 330,217.30
  4. Step 4: Simplify right side
    405,012.70x = 200,613,300,389.57
  5. Step 5: Solve for x
    x = 200,613,300,389.57/405,012.70
  6. Step 6: Final answer
    x = 495,325.95

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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.