Home / 1,420.60-2,127.66-1,111.96

Finding the Fourth Proportional to 1,420.60, 2,127.66 and 1,111.96

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Solution

The fourth proportional to 1,420.60, 2,127.66 and 1,111.96 is: 1,665.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.60 : 2,127.66 = 1,111.96 : x
  2. Step 2: Convert to fraction form
    1,420.60/2,127.66 = 1,111.96/x
  3. Step 3: Cross multiply
    1,420.60x = 2,127.66 × 1,111.96
  4. Step 4: Simplify right side
    1,420.60x = 2,365,872.81
  5. Step 5: Solve for x
    x = 2,365,872.81/1,420.60
  6. Step 6: Final answer
    x = 1,665.40

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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.