Home / 1,403.78-1,936.16-1,030.64

Finding the Fourth Proportional to 1,403.78, 1,936.16 and 1,030.64

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Solution

The fourth proportional to 1,403.78, 1,936.16 and 1,030.64 is: 1,421.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.78 : 1,936.16 = 1,030.64 : x
  2. Step 2: Convert to fraction form
    1,403.78/1,936.16 = 1,030.64/x
  3. Step 3: Cross multiply
    1,403.78x = 1,936.16 × 1,030.64
  4. Step 4: Simplify right side
    1,403.78x = 1,995,476.84
  5. Step 5: Solve for x
    x = 1,995,476.84/1,403.78
  6. Step 6: Final answer
    x = 1,421.51

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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.