Home / 1,409.10-2,113.65-1,328.10

Finding the Fourth Proportional to 1,409.10, 2,113.65 and 1,328.10

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Solution

The fourth proportional to 1,409.10, 2,113.65 and 1,328.10 is: 1,992.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.10 : 2,113.65 = 1,328.10 : x
  2. Step 2: Convert to fraction form
    1,409.10/2,113.65 = 1,328.10/x
  3. Step 3: Cross multiply
    1,409.10x = 2,113.65 × 1,328.10
  4. Step 4: Simplify right side
    1,409.10x = 2,807,138.57
  5. Step 5: Solve for x
    x = 2,807,138.57/1,409.10
  6. Step 6: Final answer
    x = 1,992.15

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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.