Home / 1,412.95-2,115.78-975.55

Finding the Fourth Proportional to 1,412.95, 2,115.78 and 975.55

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Solution

The fourth proportional to 1,412.95, 2,115.78 and 975.55 is: 1,460.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,412.95 : 2,115.78 = 975.55 : x
  2. Step 2: Convert to fraction form
    1,412.95/2,115.78 = 975.55/x
  3. Step 3: Cross multiply
    1,412.95x = 2,115.78 × 975.55
  4. Step 4: Simplify right side
    1,412.95x = 2,064,049.18
  5. Step 5: Solve for x
    x = 2,064,049.18/1,412.95
  6. Step 6: Final answer
    x = 1,460.81

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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.