Home / 2,122.31-2,929.80-1,415.33

Finding the Fourth Proportional to 2,122.31, 2,929.80 and 1,415.33

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Solution

The fourth proportional to 2,122.31, 2,929.80 and 1,415.33 is: 1,953.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.31 : 2,929.80 = 1,415.33 : x
  2. Step 2: Convert to fraction form
    2,122.31/2,929.80 = 1,415.33/x
  3. Step 3: Cross multiply
    2,122.31x = 2,929.80 × 1,415.33
  4. Step 4: Simplify right side
    2,122.31x = 4,146,633.83
  5. Step 5: Solve for x
    x = 4,146,633.83/2,122.31
  6. Step 6: Final answer
    x = 1,953.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.