Home / 1,620.31-2,430.26-450.40

Finding the Fourth Proportional to 1,620.31, 2,430.26 and 450.40

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Solution

The fourth proportional to 1,620.31, 2,430.26 and 450.40 is: 675.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.31 : 2,430.26 = 450.40 : x
  2. Step 2: Convert to fraction form
    1,620.31/2,430.26 = 450.40/x
  3. Step 3: Cross multiply
    1,620.31x = 2,430.26 × 450.40
  4. Step 4: Simplify right side
    1,620.31x = 1,094,574.70
  5. Step 5: Solve for x
    x = 1,094,574.70/1,620.31
  6. Step 6: Final answer
    x = 675.54

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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.