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Finding the Fourth Proportional to 5,640.67, 8,461.23 and 1,945.45

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Solution

The fourth proportional to 5,640.67, 8,461.23 and 1,945.45 is: 2,918.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,640.67 : 8,461.23 = 1,945.45 : x
  2. Step 2: Convert to fraction form
    5,640.67/8,461.23 = 1,945.45/x
  3. Step 3: Cross multiply
    5,640.67x = 8,461.23 × 1,945.45
  4. Step 4: Simplify right side
    5,640.67x = 16,460,899.90
  5. Step 5: Solve for x
    x = 16,460,899.90/5,640.67
  6. Step 6: Final answer
    x = 2,918.25

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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.