Home / 286,600.06-430,016.73-128,902.78

Finding the Fourth Proportional to 286,600.06, 430,016.73 and 128,902.78

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Solution

The fourth proportional to 286,600.06, 430,016.73 and 128,902.78 is: 193,406.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,600.06 : 430,016.73 = 128,902.78 : x
  2. Step 2: Convert to fraction form
    286,600.06/430,016.73 = 128,902.78/x
  3. Step 3: Cross multiply
    286,600.06x = 430,016.73 × 128,902.78
  4. Step 4: Simplify right side
    286,600.06x = 55,430,351,943.51
  5. Step 5: Solve for x
    x = 55,430,351,943.51/286,600.06
  6. Step 6: Final answer
    x = 193,406.63

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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.