Home / 1,110.08-1,531.20-815.36

Finding the Fourth Proportional to 1,110.08, 1,531.20 and 815.36

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Solution

The fourth proportional to 1,110.08, 1,531.20 and 815.36 is: 1,124.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.08 : 1,531.20 = 815.36 : x
  2. Step 2: Convert to fraction form
    1,110.08/1,531.20 = 815.36/x
  3. Step 3: Cross multiply
    1,110.08x = 1,531.20 × 815.36
  4. Step 4: Simplify right side
    1,110.08x = 1,248,479.23
  5. Step 5: Solve for x
    x = 1,248,479.23/1,110.08
  6. Step 6: Final answer
    x = 1,124.68

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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.