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Finding the Fourth Proportional to 4,809.99, 7,215.71 and 1,690.37

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Solution

The fourth proportional to 4,809.99, 7,215.71 and 1,690.37 is: 2,535.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,809.99 : 7,215.71 = 1,690.37 : x
  2. Step 2: Convert to fraction form
    4,809.99/7,215.71 = 1,690.37/x
  3. Step 3: Cross multiply
    4,809.99x = 7,215.71 × 1,690.37
  4. Step 4: Simplify right side
    4,809.99x = 12,197,175.18
  5. Step 5: Solve for x
    x = 12,197,175.18/4,809.99
  6. Step 6: Final answer
    x = 2,535.80

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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.