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Finding the Fourth Proportional to 430,998.80, 645,623.40 and 243,791.60

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Solution

The fourth proportional to 430,998.80, 645,623.40 and 243,791.60 is: 365,192.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,998.80 : 645,623.40 = 243,791.60 : x
  2. Step 2: Convert to fraction form
    430,998.80/645,623.40 = 243,791.60/x
  3. Step 3: Cross multiply
    430,998.80x = 645,623.40 × 243,791.60
  4. Step 4: Simplify right side
    430,998.80x = 157,397,561,683.44
  5. Step 5: Solve for x
    x = 157,397,561,683.44/430,998.80
  6. Step 6: Final answer
    x = 365,192.58

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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.