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Finding the Fourth Proportional to 5,378.79, 7,421.93 and 3,020.48

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Solution

The fourth proportional to 5,378.79, 7,421.93 and 3,020.48 is: 4,167.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,378.79 : 7,421.93 = 3,020.48 : x
  2. Step 2: Convert to fraction form
    5,378.79/7,421.93 = 3,020.48/x
  3. Step 3: Cross multiply
    5,378.79x = 7,421.93 × 3,020.48
  4. Step 4: Simplify right side
    5,378.79x = 22,417,738.91
  5. Step 5: Solve for x
    x = 22,417,738.91/5,378.79
  6. Step 6: Final answer
    x = 4,167.80

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.