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Finding the Fourth Proportional to 405,646.10, 608,469.15 and 366,938.90

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Solution

The fourth proportional to 405,646.10, 608,469.15 and 366,938.90 is: 550,408.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,646.10 : 608,469.15 = 366,938.90 : x
  2. Step 2: Convert to fraction form
    405,646.10/608,469.15 = 366,938.90/x
  3. Step 3: Cross multiply
    405,646.10x = 608,469.15 × 366,938.90
  4. Step 4: Simplify right side
    405,646.10x = 223,271,000,584.94
  5. Step 5: Solve for x
    x = 223,271,000,584.94/405,646.10
  6. Step 6: Final answer
    x = 550,408.35

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Double scale
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Similar ratio
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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.