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Finding the Fourth Proportional to 451,414.56, 623,150.52 and 315,980.40

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Solution

The fourth proportional to 451,414.56, 623,150.52 and 315,980.40 is: 436,191.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,414.56 : 623,150.52 = 315,980.40 : x
  2. Step 2: Convert to fraction form
    451,414.56/623,150.52 = 315,980.40/x
  3. Step 3: Cross multiply
    451,414.56x = 623,150.52 × 315,980.40
  4. Step 4: Simplify right side
    451,414.56x = 196,903,350,569.81
  5. Step 5: Solve for x
    x = 196,903,350,569.81/451,414.56
  6. Step 6: Final answer
    x = 436,191.85

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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.