Home / 1,621.68-2,431.32-647.04

Finding the Fourth Proportional to 1,621.68, 2,431.32 and 647.04

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Solution

The fourth proportional to 1,621.68, 2,431.32 and 647.04 is: 970.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.68 : 2,431.32 = 647.04 : x
  2. Step 2: Convert to fraction form
    1,621.68/2,431.32 = 647.04/x
  3. Step 3: Cross multiply
    1,621.68x = 2,431.32 × 647.04
  4. Step 4: Simplify right side
    1,621.68x = 1,573,161.29
  5. Step 5: Solve for x
    x = 1,573,161.29/1,621.68
  6. Step 6: Final answer
    x = 970.08

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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.