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Finding the Fourth Proportional to 645,506.96, 890,737.20 and 373,520.64

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Solution

The fourth proportional to 645,506.96, 890,737.20 and 373,520.64 is: 515,422.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,506.96 : 890,737.20 = 373,520.64 : x
  2. Step 2: Convert to fraction form
    645,506.96/890,737.20 = 373,520.64/x
  3. Step 3: Cross multiply
    645,506.96x = 890,737.20 × 373,520.64
  4. Step 4: Simplify right side
    645,506.96x = 332,708,729,015.81
  5. Step 5: Solve for x
    x = 332,708,729,015.81/645,506.96
  6. Step 6: Final answer
    x = 515,422.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.