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Finding the Fourth Proportional to 1,284.03, 1,924.92 and 553.50

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Solution

The fourth proportional to 1,284.03, 1,924.92 and 553.50 is: 829.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.03 : 1,924.92 = 553.50 : x
  2. Step 2: Convert to fraction form
    1,284.03/1,924.92 = 553.50/x
  3. Step 3: Cross multiply
    1,284.03x = 1,924.92 × 553.50
  4. Step 4: Simplify right side
    1,284.03x = 1,065,443.22
  5. Step 5: Solve for x
    x = 1,065,443.22/1,284.03
  6. Step 6: Final answer
    x = 829.77

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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.