Home / 642,633.87-886,632.09-370,665.30

Finding the Fourth Proportional to 642,633.87, 886,632.09 and 370,665.30

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Solution

The fourth proportional to 642,633.87, 886,632.09 and 370,665.30 is: 511,401.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,633.87 : 886,632.09 = 370,665.30 : x
  2. Step 2: Convert to fraction form
    642,633.87/886,632.09 = 370,665.30/x
  3. Step 3: Cross multiply
    642,633.87x = 886,632.09 × 370,665.30
  4. Step 4: Simplify right side
    642,633.87x = 328,643,749,629.48
  5. Step 5: Solve for x
    x = 328,643,749,629.48/642,633.87
  6. Step 6: Final answer
    x = 511,401.23

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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.