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Finding the Fourth Proportional to 642,206.64, 886,245.24 and 355,745.28

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Solution

The fourth proportional to 642,206.64, 886,245.24 and 355,745.28 is: 490,928.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,206.64 : 886,245.24 = 355,745.28 : x
  2. Step 2: Convert to fraction form
    642,206.64/886,245.24 = 355,745.28/x
  3. Step 3: Cross multiply
    642,206.64x = 886,245.24 × 355,745.28
  4. Step 4: Simplify right side
    642,206.64x = 315,277,561,052.47
  5. Step 5: Solve for x
    x = 315,277,561,052.47/642,206.64
  6. Step 6: Final answer
    x = 490,928.53

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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.