Home / 1,158.12-1,736.41-638.37

Finding the Fourth Proportional to 1,158.12, 1,736.41 and 638.37

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Solution

The fourth proportional to 1,158.12, 1,736.41 and 638.37 is: 957.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.12 : 1,736.41 = 638.37 : x
  2. Step 2: Convert to fraction form
    1,158.12/1,736.41 = 638.37/x
  3. Step 3: Cross multiply
    1,158.12x = 1,736.41 × 638.37
  4. Step 4: Simplify right side
    1,158.12x = 1,108,468.86
  5. Step 5: Solve for x
    x = 1,108,468.86/1,158.12
  6. Step 6: Final answer
    x = 957.13

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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.