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Finding the Fourth Proportional to 405,013.70, 607,520.55 and 330,218.30

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Solution

The fourth proportional to 405,013.70, 607,520.55 and 330,218.30 is: 495,327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,013.70 : 607,520.55 = 330,218.30 : x
  2. Step 2: Convert to fraction form
    405,013.70/607,520.55 = 330,218.30/x
  3. Step 3: Cross multiply
    405,013.70x = 607,520.55 × 330,218.30
  4. Step 4: Simplify right side
    405,013.70x = 200,614,403,236.07
  5. Step 5: Solve for x
    x = 200,614,403,236.07/405,013.70
  6. Step 6: Final answer
    x = 495,327.45

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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.