Home / 2,289.16-3,430.32-989.92

Finding the Fourth Proportional to 2,289.16, 3,430.32 and 989.92

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Solution

The fourth proportional to 2,289.16, 3,430.32 and 989.92 is: 1,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.16 : 3,430.32 = 989.92 : x
  2. Step 2: Convert to fraction form
    2,289.16/3,430.32 = 989.92/x
  3. Step 3: Cross multiply
    2,289.16x = 3,430.32 × 989.92
  4. Step 4: Simplify right side
    2,289.16x = 3,395,742.37
  5. Step 5: Solve for x
    x = 3,395,742.37/2,289.16
  6. Step 6: Final answer
    x = 1,483.40

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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.