Home / 1,621.40-2,431.56-525.52

Finding the Fourth Proportional to 1,621.40, 2,431.56 and 525.52

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Solution

The fourth proportional to 1,621.40, 2,431.56 and 525.52 is: 788.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.40 : 2,431.56 = 525.52 : x
  2. Step 2: Convert to fraction form
    1,621.40/2,431.56 = 525.52/x
  3. Step 3: Cross multiply
    1,621.40x = 2,431.56 × 525.52
  4. Step 4: Simplify right side
    1,621.40x = 1,277,833.41
  5. Step 5: Solve for x
    x = 1,277,833.41/1,621.40
  6. Step 6: Final answer
    x = 788.10

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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.