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Finding the Fourth Proportional to 405,012.20, 607,518.30 and 330,216.80

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Solution

The fourth proportional to 405,012.20, 607,518.30 and 330,216.80 is: 495,325.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,012.20 : 607,518.30 = 330,216.80 : x
  2. Step 2: Convert to fraction form
    405,012.20/607,518.30 = 330,216.80/x
  3. Step 3: Cross multiply
    405,012.20x = 607,518.30 × 330,216.80
  4. Step 4: Simplify right side
    405,012.20x = 200,612,748,967.44
  5. Step 5: Solve for x
    x = 200,612,748,967.44/405,012.20
  6. Step 6: Final answer
    x = 495,325.20

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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.