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Finding the Fourth Proportional to 1,742,699.84, 2,404,664.89 and 978,605.78

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Solution

The fourth proportional to 1,742,699.84, 2,404,664.89 and 978,605.78 is: 1,350,329.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742,699.84 : 2,404,664.89 = 978,605.78 : x
  2. Step 2: Convert to fraction form
    1,742,699.84/2,404,664.89 = 978,605.78/x
  3. Step 3: Cross multiply
    1,742,699.84x = 2,404,664.89 × 978,605.78
  4. Step 4: Simplify right side
    1,742,699.84x = 2,353,218,945,847.23
  5. Step 5: Solve for x
    x = 2,353,218,945,847.23/1,742,699.84
  6. Step 6: Final answer
    x = 1,350,329.47

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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.