Home / 1,530.58-2,112.20-909.58

Finding the Fourth Proportional to 1,530.58, 2,112.20 and 909.58

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Solution

The fourth proportional to 1,530.58, 2,112.20 and 909.58 is: 1,255.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.58 : 2,112.20 = 909.58 : x
  2. Step 2: Convert to fraction form
    1,530.58/2,112.20 = 909.58/x
  3. Step 3: Cross multiply
    1,530.58x = 2,112.20 × 909.58
  4. Step 4: Simplify right side
    1,530.58x = 1,921,212.60
  5. Step 5: Solve for x
    x = 1,921,212.60/1,530.58
  6. Step 6: Final answer
    x = 1,255.22

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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.