Home / 3,128.10-4,316.36-1,783.89

Finding the Fourth Proportional to 3,128.10, 4,316.36 and 1,783.89

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Solution

The fourth proportional to 3,128.10, 4,316.36 and 1,783.89 is: 2,461.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.10 : 4,316.36 = 1,783.89 : x
  2. Step 2: Convert to fraction form
    3,128.10/4,316.36 = 1,783.89/x
  3. Step 3: Cross multiply
    3,128.10x = 4,316.36 × 1,783.89
  4. Step 4: Simplify right side
    3,128.10x = 7,699,911.44
  5. Step 5: Solve for x
    x = 7,699,911.44/3,128.10
  6. Step 6: Final answer
    x = 2,461.53

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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.