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Finding the Fourth Proportional to 1,354,844.74, 1,869,513.90 and 742,836.45

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Solution

The fourth proportional to 1,354,844.74, 1,869,513.90 and 742,836.45 is: 1,025,020.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354,844.74 : 1,869,513.90 = 742,836.45 : x
  2. Step 2: Convert to fraction form
    1,354,844.74/1,869,513.90 = 742,836.45/x
  3. Step 3: Cross multiply
    1,354,844.74x = 1,869,513.90 × 742,836.45
  4. Step 4: Simplify right side
    1,354,844.74x = 1,388,743,073,623.10
  5. Step 5: Solve for x
    x = 1,388,743,073,623.10/1,354,844.74
  6. Step 6: Final answer
    x = 1,025,020.09

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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.