Home / 1,178.10-1,625.22-828.99

Finding the Fourth Proportional to 1,178.10, 1,625.22 and 828.99

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Solution

The fourth proportional to 1,178.10, 1,625.22 and 828.99 is: 1,143.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.10 : 1,625.22 = 828.99 : x
  2. Step 2: Convert to fraction form
    1,178.10/1,625.22 = 828.99/x
  3. Step 3: Cross multiply
    1,178.10x = 1,625.22 × 828.99
  4. Step 4: Simplify right side
    1,178.10x = 1,347,291.13
  5. Step 5: Solve for x
    x = 1,347,291.13/1,178.10
  6. Step 6: Final answer
    x = 1,143.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.