Home / 412,285.60-618,428.40-131,831.20

Finding the Fourth Proportional to 412,285.60, 618,428.40 and 131,831.20

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Solution

The fourth proportional to 412,285.60, 618,428.40 and 131,831.20 is: 197,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,285.60 : 618,428.40 = 131,831.20 : x
  2. Step 2: Convert to fraction form
    412,285.60/618,428.40 = 131,831.20/x
  3. Step 3: Cross multiply
    412,285.60x = 618,428.40 × 131,831.20
  4. Step 4: Simplify right side
    412,285.60x = 81,528,158,086.08
  5. Step 5: Solve for x
    x = 81,528,158,086.08/412,285.60
  6. Step 6: Final answer
    x = 197,746.80

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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.