Home / 3,128.34-4,316.79-1,801.98

Finding the Fourth Proportional to 3,128.34, 4,316.79 and 1,801.98

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Solution

The fourth proportional to 3,128.34, 4,316.79 and 1,801.98 is: 2,486.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.34 : 4,316.79 = 1,801.98 : x
  2. Step 2: Convert to fraction form
    3,128.34/4,316.79 = 1,801.98/x
  3. Step 3: Cross multiply
    3,128.34x = 4,316.79 × 1,801.98
  4. Step 4: Simplify right side
    3,128.34x = 7,778,769.24
  5. Step 5: Solve for x
    x = 7,778,769.24/3,128.34
  6. Step 6: Final answer
    x = 2,486.55

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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.