Home / 1,084.20-1,625.22-621.42

Finding the Fourth Proportional to 1,084.20, 1,625.22 and 621.42

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Solution

The fourth proportional to 1,084.20, 1,625.22 and 621.42 is: 931.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,084.20 : 1,625.22 = 621.42 : x
  2. Step 2: Convert to fraction form
    1,084.20/1,625.22 = 621.42/x
  3. Step 3: Cross multiply
    1,084.20x = 1,625.22 × 621.42
  4. Step 4: Simplify right side
    1,084.20x = 1,009,944.21
  5. Step 5: Solve for x
    x = 1,009,944.21/1,084.20
  6. Step 6: Final answer
    x = 931.51

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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.