Home / 1,990.38-2,985.64-529.54

Finding the Fourth Proportional to 1,990.38, 2,985.64 and 529.54

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Solution

The fourth proportional to 1,990.38, 2,985.64 and 529.54 is: 794.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.38 : 2,985.64 = 529.54 : x
  2. Step 2: Convert to fraction form
    1,990.38/2,985.64 = 529.54/x
  3. Step 3: Cross multiply
    1,990.38x = 2,985.64 × 529.54
  4. Step 4: Simplify right side
    1,990.38x = 1,581,015.81
  5. Step 5: Solve for x
    x = 1,581,015.81/1,990.38
  6. Step 6: Final answer
    x = 794.33

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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.