Home / 1,621.26-2,431.80-526.32

Finding the Fourth Proportional to 1,621.26, 2,431.80 and 526.32

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Solution

The fourth proportional to 1,621.26, 2,431.80 and 526.32 is: 789.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.26 : 2,431.80 = 526.32 : x
  2. Step 2: Convert to fraction form
    1,621.26/2,431.80 = 526.32/x
  3. Step 3: Cross multiply
    1,621.26x = 2,431.80 × 526.32
  4. Step 4: Simplify right side
    1,621.26x = 1,279,904.98
  5. Step 5: Solve for x
    x = 1,279,904.98/1,621.26
  6. Step 6: Final answer
    x = 789.45

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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.