Home / 1,110-1,530.72-1,005.36

Finding the Fourth Proportional to 1,110, 1,530.72 and 1,005.36

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Solution

The fourth proportional to 1,110, 1,530.72 and 1,005.36 is: 1,386.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110 : 1,530.72 = 1,005.36 : x
  2. Step 2: Convert to fraction form
    1,110/1,530.72 = 1,005.36/x
  3. Step 3: Cross multiply
    1,110x = 1,530.72 × 1,005.36
  4. Step 4: Simplify right side
    1,110x = 1,538,924.66
  5. Step 5: Solve for x
    x = 1,538,924.66/1,110
  6. Step 6: Final answer
    x = 1,386.42

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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.