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Finding the Fourth Proportional to 1,318,807, 1,819,954.74 and 715,195

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Solution

The fourth proportional to 1,318,807, 1,819,954.74 and 715,195 is: 986,969.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,807 : 1,819,954.74 = 715,195 : x
  2. Step 2: Convert to fraction form
    1,318,807/1,819,954.74 = 715,195/x
  3. Step 3: Cross multiply
    1,318,807x = 1,819,954.74 × 715,195
  4. Step 4: Simplify right side
    1,318,807x = 1,301,622,530,274.30
  5. Step 5: Solve for x
    x = 1,301,622,530,274.30/1,318,807
  6. Step 6: Final answer
    x = 986,969.69

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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.