Home / 1,620.17-2,431.32-890.25

Finding the Fourth Proportional to 1,620.17, 2,431.32 and 890.25

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Solution

The fourth proportional to 1,620.17, 2,431.32 and 890.25 is: 1,335.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.17 : 2,431.32 = 890.25 : x
  2. Step 2: Convert to fraction form
    1,620.17/2,431.32 = 890.25/x
  3. Step 3: Cross multiply
    1,620.17x = 2,431.32 × 890.25
  4. Step 4: Simplify right side
    1,620.17x = 2,164,482.63
  5. Step 5: Solve for x
    x = 2,164,482.63/1,620.17
  6. Step 6: Final answer
    x = 1,335.96

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1.5x scale

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.