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Finding the Fourth Proportional to 1,296,683.05, 1,789,445.58 and 715,974.40

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Solution

The fourth proportional to 1,296,683.05, 1,789,445.58 and 715,974.40 is: 988,057.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,683.05 : 1,789,445.58 = 715,974.40 : x
  2. Step 2: Convert to fraction form
    1,296,683.05/1,789,445.58 = 715,974.40/x
  3. Step 3: Cross multiply
    1,296,683.05x = 1,789,445.58 × 715,974.40
  4. Step 4: Simplify right side
    1,296,683.05x = 1,281,197,225,473.15
  5. Step 5: Solve for x
    x = 1,281,197,225,473.15/1,296,683.05
  6. Step 6: Final answer
    x = 988,057.36

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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.