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Finding the Fourth Proportional to 328,478.70, 492,718.05 and 275,334.60

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Solution

The fourth proportional to 328,478.70, 492,718.05 and 275,334.60 is: 413,001.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,478.70 : 492,718.05 = 275,334.60 : x
  2. Step 2: Convert to fraction form
    328,478.70/492,718.05 = 275,334.60/x
  3. Step 3: Cross multiply
    328,478.70x = 492,718.05 × 275,334.60
  4. Step 4: Simplify right side
    328,478.70x = 135,662,327,209.53
  5. Step 5: Solve for x
    x = 135,662,327,209.53/328,478.70
  6. Step 6: Final answer
    x = 413,001.90

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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.