Home / 1,621.26-2,431.89-647.37

Finding the Fourth Proportional to 1,621.26, 2,431.89 and 647.37

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Solution

The fourth proportional to 1,621.26, 2,431.89 and 647.37 is: 971.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.26 : 2,431.89 = 647.37 : x
  2. Step 2: Convert to fraction form
    1,621.26/2,431.89 = 647.37/x
  3. Step 3: Cross multiply
    1,621.26x = 2,431.89 × 647.37
  4. Step 4: Simplify right side
    1,621.26x = 1,574,332.63
  5. Step 5: Solve for x
    x = 1,574,332.63/1,621.26
  6. Step 6: Final answer
    x = 971.06

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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.