Home / 1,074.24-1,479.60-987.84

Finding the Fourth Proportional to 1,074.24, 1,479.60 and 987.84

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Solution

The fourth proportional to 1,074.24, 1,479.60 and 987.84 is: 1,360.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,074.24 : 1,479.60 = 987.84 : x
  2. Step 2: Convert to fraction form
    1,074.24/1,479.60 = 987.84/x
  3. Step 3: Cross multiply
    1,074.24x = 1,479.60 × 987.84
  4. Step 4: Simplify right side
    1,074.24x = 1,461,608.06
  5. Step 5: Solve for x
    x = 1,461,608.06/1,074.24
  6. Step 6: Final answer
    x = 1,360.60

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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.