Home / 2,123.63-2,929.73-1,405.97

Finding the Fourth Proportional to 2,123.63, 2,929.73 and 1,405.97

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Solution

The fourth proportional to 2,123.63, 2,929.73 and 1,405.97 is: 1,939.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.63 : 2,929.73 = 1,405.97 : x
  2. Step 2: Convert to fraction form
    2,123.63/2,929.73 = 1,405.97/x
  3. Step 3: Cross multiply
    2,123.63x = 2,929.73 × 1,405.97
  4. Step 4: Simplify right side
    2,123.63x = 4,119,090.81
  5. Step 5: Solve for x
    x = 4,119,090.81/2,123.63
  6. Step 6: Final answer
    x = 1,939.65

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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.