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Finding the Fourth Proportional to 228,928.63, 315,920.51 and 128,326.63

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Solution

The fourth proportional to 228,928.63, 315,920.51 and 128,326.63 is: 177,090.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,928.63 : 315,920.51 = 128,326.63 : x
  2. Step 2: Convert to fraction form
    228,928.63/315,920.51 = 128,326.63/x
  3. Step 3: Cross multiply
    228,928.63x = 315,920.51 × 128,326.63
  4. Step 4: Simplify right side
    228,928.63x = 40,541,014,396.18
  5. Step 5: Solve for x
    x = 40,541,014,396.18/228,928.63
  6. Step 6: Final answer
    x = 177,090.19

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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.