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Finding the Fourth Proportional to 1,415.99, 2,123.99 and 550.51

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Solution

The fourth proportional to 1,415.99, 2,123.99 and 550.51 is: 825.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.99 : 2,123.99 = 550.51 : x
  2. Step 2: Convert to fraction form
    1,415.99/2,123.99 = 550.51/x
  3. Step 3: Cross multiply
    1,415.99x = 2,123.99 × 550.51
  4. Step 4: Simplify right side
    1,415.99x = 1,169,271.74
  5. Step 5: Solve for x
    x = 1,169,271.74/1,415.99
  6. Step 6: Final answer
    x = 825.76

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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.