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Finding the Fourth Proportional to 5,153, 7,729.56 and 1,690.40

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Solution

The fourth proportional to 5,153, 7,729.56 and 1,690.40 is: 2,535.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,153 : 7,729.56 = 1,690.40 : x
  2. Step 2: Convert to fraction form
    5,153/7,729.56 = 1,690.40/x
  3. Step 3: Cross multiply
    5,153x = 7,729.56 × 1,690.40
  4. Step 4: Simplify right side
    5,153x = 13,066,048.22
  5. Step 5: Solve for x
    x = 13,066,048.22/5,153
  6. Step 6: Final answer
    x = 2,535.62

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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.