Home / 1,238,576.90-1,857,419.61-428,741.28

Finding the Fourth Proportional to 1,238,576.90, 1,857,419.61 and 428,741.28

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Solution

The fourth proportional to 1,238,576.90, 1,857,419.61 and 428,741.28 is: 642,957.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,576.90 : 1,857,419.61 = 428,741.28 : x
  2. Step 2: Convert to fraction form
    1,238,576.90/1,857,419.61 = 428,741.28/x
  3. Step 3: Cross multiply
    1,238,576.90x = 1,857,419.61 × 428,741.28
  4. Step 4: Simplify right side
    1,238,576.90x = 796,352,454,256.73
  5. Step 5: Solve for x
    x = 796,352,454,256.73/1,238,576.90
  6. Step 6: Final answer
    x = 642,957.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.