Home / 1,100.20-1,518.60-707.35

Finding the Fourth Proportional to 1,100.20, 1,518.60 and 707.35

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Solution

The fourth proportional to 1,100.20, 1,518.60 and 707.35 is: 976.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.20 : 1,518.60 = 707.35 : x
  2. Step 2: Convert to fraction form
    1,100.20/1,518.60 = 707.35/x
  3. Step 3: Cross multiply
    1,100.20x = 1,518.60 × 707.35
  4. Step 4: Simplify right side
    1,100.20x = 1,074,181.71
  5. Step 5: Solve for x
    x = 1,074,181.71/1,100.20
  6. Step 6: Final answer
    x = 976.35

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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.