Home / 445,289.60-668,015.40-145,686.80

Finding the Fourth Proportional to 445,289.60, 668,015.40 and 145,686.80

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Solution

The fourth proportional to 445,289.60, 668,015.40 and 145,686.80 is: 218,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,289.60 : 668,015.40 = 145,686.80 : x
  2. Step 2: Convert to fraction form
    445,289.60/668,015.40 = 145,686.80/x
  3. Step 3: Cross multiply
    445,289.60x = 668,015.40 × 145,686.80
  4. Step 4: Simplify right side
    445,289.60x = 97,321,025,976.72
  5. Step 5: Solve for x
    x = 97,321,025,976.72/445,289.60
  6. Step 6: Final answer
    x = 218,556.70

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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.