Home / 642,185.88-886,216.51-355,724.52

Finding the Fourth Proportional to 642,185.88, 886,216.51 and 355,724.52

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Solution

The fourth proportional to 642,185.88, 886,216.51 and 355,724.52 is: 490,899.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,185.88 : 886,216.51 = 355,724.52 : x
  2. Step 2: Convert to fraction form
    642,185.88/886,216.51 = 355,724.52/x
  3. Step 3: Cross multiply
    642,185.88x = 886,216.51 × 355,724.52
  4. Step 4: Simplify right side
    642,185.88x = 315,248,942,635.83
  5. Step 5: Solve for x
    x = 315,248,942,635.83/642,185.88
  6. Step 6: Final answer
    x = 490,899.84

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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.