Home / 642,086.04-886,078.35-355,605.84

Finding the Fourth Proportional to 642,086.04, 886,078.35 and 355,605.84

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Solution

The fourth proportional to 642,086.04, 886,078.35 and 355,605.84 is: 490,735.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,086.04 : 886,078.35 = 355,605.84 : x
  2. Step 2: Convert to fraction form
    642,086.04/886,078.35 = 355,605.84/x
  3. Step 3: Cross multiply
    642,086.04x = 886,078.35 × 355,605.84
  4. Step 4: Simplify right side
    642,086.04x = 315,094,635,957.56
  5. Step 5: Solve for x
    x = 315,094,635,957.56/642,086.04
  6. Step 6: Final answer
    x = 490,735.85

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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.