Home / 1,678.48-2,315.82-1,015.35

Finding the Fourth Proportional to 1,678.48, 2,315.82 and 1,015.35

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Solution

The fourth proportional to 1,678.48, 2,315.82 and 1,015.35 is: 1,400.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.48 : 2,315.82 = 1,015.35 : x
  2. Step 2: Convert to fraction form
    1,678.48/2,315.82 = 1,015.35/x
  3. Step 3: Cross multiply
    1,678.48x = 2,315.82 × 1,015.35
  4. Step 4: Simplify right side
    1,678.48x = 2,351,367.84
  5. Step 5: Solve for x
    x = 2,351,367.84/1,678.48
  6. Step 6: Final answer
    x = 1,400.89

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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.