Home / 1,621.70-2,433.53-647.72

Finding the Fourth Proportional to 1,621.70, 2,433.53 and 647.72

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Solution

The fourth proportional to 1,621.70, 2,433.53 and 647.72 is: 971.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,621.70 : 2,433.53 = 647.72 : x
  2. Step 2: Convert to fraction form
    1,621.70/2,433.53 = 647.72/x
  3. Step 3: Cross multiply
    1,621.70x = 2,433.53 × 647.72
  4. Step 4: Simplify right side
    1,621.70x = 1,576,244.63
  5. Step 5: Solve for x
    x = 1,576,244.63/1,621.70
  6. Step 6: Final answer
    x = 971.97

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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.