Home / 1,621.08-2,431.52-646.48

Finding the Fourth Proportional to 1,621.08, 2,431.52 and 646.48

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Solution

The fourth proportional to 1,621.08, 2,431.52 and 646.48 is: 969.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.08 : 2,431.52 = 646.48 : x
  2. Step 2: Convert to fraction form
    1,621.08/2,431.52 = 646.48/x
  3. Step 3: Cross multiply
    1,621.08x = 2,431.52 × 646.48
  4. Step 4: Simplify right side
    1,621.08x = 1,571,931.28
  5. Step 5: Solve for x
    x = 1,571,931.28/1,621.08
  6. Step 6: Final answer
    x = 969.68

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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.