Home / 1,415.12-2,121.34-893.53

Finding the Fourth Proportional to 1,415.12, 2,121.34 and 893.53

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Solution

The fourth proportional to 1,415.12, 2,121.34 and 893.53 is: 1,339.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.12 : 2,121.34 = 893.53 : x
  2. Step 2: Convert to fraction form
    1,415.12/2,121.34 = 893.53/x
  3. Step 3: Cross multiply
    1,415.12x = 2,121.34 × 893.53
  4. Step 4: Simplify right side
    1,415.12x = 1,895,483.02
  5. Step 5: Solve for x
    x = 1,895,483.02/1,415.12
  6. Step 6: Final answer
    x = 1,339.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.