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Finding the Fourth Proportional to 1,620.97, 2,431.49 and 525.33

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Solution

The fourth proportional to 1,620.97, 2,431.49 and 525.33 is: 788.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.97 : 2,431.49 = 525.33 : x
  2. Step 2: Convert to fraction form
    1,620.97/2,431.49 = 525.33/x
  3. Step 3: Cross multiply
    1,620.97x = 2,431.49 × 525.33
  4. Step 4: Simplify right side
    1,620.97x = 1,277,332.02
  5. Step 5: Solve for x
    x = 1,277,332.02/1,620.97
  6. Step 6: Final answer
    x = 788.01

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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.