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Finding the Fourth Proportional to 382,956.96, 528,400.52 and 221,802.36

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Solution

The fourth proportional to 382,956.96, 528,400.52 and 221,802.36 is: 306,040.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,956.96 : 528,400.52 = 221,802.36 : x
  2. Step 2: Convert to fraction form
    382,956.96/528,400.52 = 221,802.36/x
  3. Step 3: Cross multiply
    382,956.96x = 528,400.52 × 221,802.36
  4. Step 4: Simplify right side
    382,956.96x = 117,200,482,361.23
  5. Step 5: Solve for x
    x = 117,200,482,361.23/382,956.96
  6. Step 6: Final answer
    x = 306,040.87

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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.