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Finding the Fourth Proportional to 382,689.37, 528,176.04 and 221,642.32

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Solution

The fourth proportional to 382,689.37, 528,176.04 and 221,642.32 is: 305,903.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,689.37 : 528,176.04 = 221,642.32 : x
  2. Step 2: Convert to fraction form
    382,689.37/528,176.04 = 221,642.32/x
  3. Step 3: Cross multiply
    382,689.37x = 528,176.04 × 221,642.32
  4. Step 4: Simplify right side
    382,689.37x = 117,066,162,874.01
  5. Step 5: Solve for x
    x = 117,066,162,874.01/382,689.37
  6. Step 6: Final answer
    x = 305,903.88

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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.