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Finding the Fourth Proportional to 709,004.18, 978,508.49 and 403,126.38

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Solution

The fourth proportional to 709,004.18, 978,508.49 and 403,126.38 is: 556,361.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,004.18 : 978,508.49 = 403,126.38 : x
  2. Step 2: Convert to fraction form
    709,004.18/978,508.49 = 403,126.38/x
  3. Step 3: Cross multiply
    709,004.18x = 978,508.49 × 403,126.38
  4. Step 4: Simplify right side
    709,004.18x = 394,462,583,357.33
  5. Step 5: Solve for x
    x = 394,462,583,357.33/709,004.18
  6. Step 6: Final answer
    x = 556,361.44

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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.