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Finding the Fourth Proportional to 675,243.06, 931,731.74 and 388,707.56

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Solution

The fourth proportional to 675,243.06, 931,731.74 and 388,707.56 is: 536,356.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,243.06 : 931,731.74 = 388,707.56 : x
  2. Step 2: Convert to fraction form
    675,243.06/931,731.74 = 388,707.56/x
  3. Step 3: Cross multiply
    675,243.06x = 931,731.74 × 388,707.56
  4. Step 4: Simplify right side
    675,243.06x = 362,171,171,229.95
  5. Step 5: Solve for x
    x = 362,171,171,229.95/675,243.06
  6. Step 6: Final answer
    x = 536,356.75

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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.