Home / 1,409.02-2,111.19-1,116.70

Finding the Fourth Proportional to 1,409.02, 2,111.19 and 1,116.70

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Solution

The fourth proportional to 1,409.02, 2,111.19 and 1,116.70 is: 1,673.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,409.02 : 2,111.19 = 1,116.70 : x
  2. Step 2: Convert to fraction form
    1,409.02/2,111.19 = 1,116.70/x
  3. Step 3: Cross multiply
    1,409.02x = 2,111.19 × 1,116.70
  4. Step 4: Simplify right side
    1,409.02x = 2,357,565.87
  5. Step 5: Solve for x
    x = 2,357,565.87/1,409.02
  6. Step 6: Final answer
    x = 1,673.20

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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.