Home / 642,238.42-886,288.98-355,777.06

Finding the Fourth Proportional to 642,238.42, 886,288.98 and 355,777.06

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Solution

The fourth proportional to 642,238.42, 886,288.98 and 355,777.06 is: 490,972.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,238.42 : 886,288.98 = 355,777.06 : x
  2. Step 2: Convert to fraction form
    642,238.42/886,288.98 = 355,777.06/x
  3. Step 3: Cross multiply
    642,238.42x = 886,288.98 × 355,777.06
  4. Step 4: Simplify right side
    642,238.42x = 315,321,287,614.80
  5. Step 5: Solve for x
    x = 315,321,287,614.80/642,238.42
  6. Step 6: Final answer
    x = 490,972.32

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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.