Home / 815,396.64-1,222,172.13-415,192.02

Finding the Fourth Proportional to 815,396.64, 1,222,172.13 and 415,192.02

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Solution

The fourth proportional to 815,396.64, 1,222,172.13 and 415,192.02 is: 622,318.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,396.64 : 1,222,172.13 = 415,192.02 : x
  2. Step 2: Convert to fraction form
    815,396.64/1,222,172.13 = 415,192.02/x
  3. Step 3: Cross multiply
    815,396.64x = 1,222,172.13 × 415,192.02
  4. Step 4: Simplify right side
    815,396.64x = 507,436,115,442.40
  5. Step 5: Solve for x
    x = 507,436,115,442.40/815,396.64
  6. Step 6: Final answer
    x = 622,318.13

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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.