Home / 305,431.16-421,742.64-190,843.28

Finding the Fourth Proportional to 305,431.16, 421,742.64 and 190,843.28

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Solution

The fourth proportional to 305,431.16, 421,742.64 and 190,843.28 is: 263,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,431.16 : 421,742.64 = 190,843.28 : x
  2. Step 2: Convert to fraction form
    305,431.16/421,742.64 = 190,843.28/x
  3. Step 3: Cross multiply
    305,431.16x = 421,742.64 × 190,843.28
  4. Step 4: Simplify right side
    305,431.16x = 80,486,748,733.46
  5. Step 5: Solve for x
    x = 80,486,748,733.46/305,431.16
  6. Step 6: Final answer
    x = 263,518.46

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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.