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Finding the Fourth Proportional to 315,173.60, 434,945.40 and 171,938.60

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Solution

The fourth proportional to 315,173.60, 434,945.40 and 171,938.60 is: 237,278.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,173.60 : 434,945.40 = 171,938.60 : x
  2. Step 2: Convert to fraction form
    315,173.60/434,945.40 = 171,938.60/x
  3. Step 3: Cross multiply
    315,173.60x = 434,945.40 × 171,938.60
  4. Step 4: Simplify right side
    315,173.60x = 74,783,903,152.44
  5. Step 5: Solve for x
    x = 74,783,903,152.44/315,173.60
  6. Step 6: Final answer
    x = 237,278.45

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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.