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Finding the Fourth Proportional to 709,272.96, 978,791.70 and 403,349.16

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Solution

The fourth proportional to 709,272.96, 978,791.70 and 403,349.16 is: 556,619.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,272.96 : 978,791.70 = 403,349.16 : x
  2. Step 2: Convert to fraction form
    709,272.96/978,791.70 = 403,349.16/x
  3. Step 3: Cross multiply
    709,272.96x = 978,791.70 × 403,349.16
  4. Step 4: Simplify right side
    709,272.96x = 394,794,810,009.97
  5. Step 5: Solve for x
    x = 394,794,810,009.97/709,272.96
  6. Step 6: Final answer
    x = 556,619.01

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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.