Home / 1,420.92-2,127.60-1,111.14

Finding the Fourth Proportional to 1,420.92, 2,127.60 and 1,111.14

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Solution

The fourth proportional to 1,420.92, 2,127.60 and 1,111.14 is: 1,663.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.92 : 2,127.60 = 1,111.14 : x
  2. Step 2: Convert to fraction form
    1,420.92/2,127.60 = 1,111.14/x
  3. Step 3: Cross multiply
    1,420.92x = 2,127.60 × 1,111.14
  4. Step 4: Simplify right side
    1,420.92x = 2,364,061.46
  5. Step 5: Solve for x
    x = 2,364,061.46/1,420.92
  6. Step 6: Final answer
    x = 1,663.75

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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.