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Finding the Fourth Proportional to 675,129.90, 931,767.39 and 388,662.06

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Solution

The fourth proportional to 675,129.90, 931,767.39 and 388,662.06 is: 536,404.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,129.90 : 931,767.39 = 388,662.06 : x
  2. Step 2: Convert to fraction form
    675,129.90/931,767.39 = 388,662.06/x
  3. Step 3: Cross multiply
    675,129.90x = 931,767.39 × 388,662.06
  4. Step 4: Simplify right side
    675,129.90x = 362,142,633,238.22
  5. Step 5: Solve for x
    x = 362,142,633,238.22/675,129.90
  6. Step 6: Final answer
    x = 536,404.38

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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.