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Finding the Fourth Proportional to 405,728.40, 608,650.20 and 125,216.40

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Solution

The fourth proportional to 405,728.40, 608,650.20 and 125,216.40 is: 187,842.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,728.40 : 608,650.20 = 125,216.40 : x
  2. Step 2: Convert to fraction form
    405,728.40/608,650.20 = 125,216.40/x
  3. Step 3: Cross multiply
    405,728.40x = 608,650.20 × 125,216.40
  4. Step 4: Simplify right side
    405,728.40x = 76,212,986,903.28
  5. Step 5: Solve for x
    x = 76,212,986,903.28/405,728.40
  6. Step 6: Final answer
    x = 187,842.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.