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Finding the Fourth Proportional to 5,203.13, 7,808.21 and 1,918.85

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Solution

The fourth proportional to 5,203.13, 7,808.21 and 1,918.85 is: 2,879.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,203.13 : 7,808.21 = 1,918.85 : x
  2. Step 2: Convert to fraction form
    5,203.13/7,808.21 = 1,918.85/x
  3. Step 3: Cross multiply
    5,203.13x = 7,808.21 × 1,918.85
  4. Step 4: Simplify right side
    5,203.13x = 14,982,774.16
  5. Step 5: Solve for x
    x = 14,982,774.16/5,203.13
  6. Step 6: Final answer
    x = 2,879.57

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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.