Home / 1,415.07-2,122.61-836.19

Finding the Fourth Proportional to 1,415.07, 2,122.61 and 836.19

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Solution

The fourth proportional to 1,415.07, 2,122.61 and 836.19 is: 1,254.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.07 : 2,122.61 = 836.19 : x
  2. Step 2: Convert to fraction form
    1,415.07/2,122.61 = 836.19/x
  3. Step 3: Cross multiply
    1,415.07x = 2,122.61 × 836.19
  4. Step 4: Simplify right side
    1,415.07x = 1,774,901.07
  5. Step 5: Solve for x
    x = 1,774,901.07/1,415.07
  6. Step 6: Final answer
    x = 1,254.29

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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.