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Finding the Fourth Proportional to 418,812.78, 628,219.21 and 292,699.33

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Solution

The fourth proportional to 418,812.78, 628,219.21 and 292,699.33 is: 439,049.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,812.78 : 628,219.21 = 292,699.33 : x
  2. Step 2: Convert to fraction form
    418,812.78/628,219.21 = 292,699.33/x
  3. Step 3: Cross multiply
    418,812.78x = 628,219.21 × 292,699.33
  4. Step 4: Simplify right side
    418,812.78x = 183,879,341,128.38
  5. Step 5: Solve for x
    x = 183,879,341,128.38/418,812.78
  6. Step 6: Final answer
    x = 439,049.03

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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.