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Finding the Fourth Proportional to 675,171.73, 931,851.56 and 388,857.58

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Solution

The fourth proportional to 675,171.73, 931,851.56 and 388,857.58 is: 536,689.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,171.73 : 931,851.56 = 388,857.58 : x
  2. Step 2: Convert to fraction form
    675,171.73/931,851.56 = 388,857.58/x
  3. Step 3: Cross multiply
    675,171.73x = 931,851.56 × 388,857.58
  4. Step 4: Simplify right side
    675,171.73x = 362,357,542,540.83
  5. Step 5: Solve for x
    x = 362,357,542,540.83/675,171.73
  6. Step 6: Final answer
    x = 536,689.45

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1.5x scale

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.