Home / 385,282.62-531,746.43-221,907.72

Finding the Fourth Proportional to 385,282.62, 531,746.43 and 221,907.72

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Solution

The fourth proportional to 385,282.62, 531,746.43 and 221,907.72 is: 306,265.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,282.62 : 531,746.43 = 221,907.72 : x
  2. Step 2: Convert to fraction form
    385,282.62/531,746.43 = 221,907.72/x
  3. Step 3: Cross multiply
    385,282.62x = 531,746.43 × 221,907.72
  4. Step 4: Simplify right side
    385,282.62x = 117,998,637,899.44
  5. Step 5: Solve for x
    x = 117,998,637,899.44/385,282.62
  6. Step 6: Final answer
    x = 306,265.15

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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.