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Finding the Fourth Proportional to 709,381.26, 978,942.24 and 387,090.36

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Solution

The fourth proportional to 709,381.26, 978,942.24 and 387,090.36 is: 534,182.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,381.26 : 978,942.24 = 387,090.36 : x
  2. Step 2: Convert to fraction form
    709,381.26/978,942.24 = 387,090.36/x
  3. Step 3: Cross multiply
    709,381.26x = 978,942.24 × 387,090.36
  4. Step 4: Simplify right side
    709,381.26x = 378,939,104,100.81
  5. Step 5: Solve for x
    x = 378,939,104,100.81/709,381.26
  6. Step 6: Final answer
    x = 534,182.57

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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.