Home / 1,322.58-1,987.47-1,247.06

Finding the Fourth Proportional to 1,322.58, 1,987.47 and 1,247.06

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Solution

The fourth proportional to 1,322.58, 1,987.47 and 1,247.06 is: 1,873.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.58 : 1,987.47 = 1,247.06 : x
  2. Step 2: Convert to fraction form
    1,322.58/1,987.47 = 1,247.06/x
  3. Step 3: Cross multiply
    1,322.58x = 1,987.47 × 1,247.06
  4. Step 4: Simplify right side
    1,322.58x = 2,478,484.40
  5. Step 5: Solve for x
    x = 2,478,484.40/1,322.58
  6. Step 6: Final answer
    x = 1,873.98

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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.