Home / 279,128.29-385,283.76-221,869.21

Finding the Fourth Proportional to 279,128.29, 385,283.76 and 221,869.21

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Solution

The fourth proportional to 279,128.29, 385,283.76 and 221,869.21 is: 306,248.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,128.29 : 385,283.76 = 221,869.21 : x
  2. Step 2: Convert to fraction form
    279,128.29/385,283.76 = 221,869.21/x
  3. Step 3: Cross multiply
    279,128.29x = 385,283.76 × 221,869.21
  4. Step 4: Simplify right side
    279,128.29x = 85,482,602,493.82
  5. Step 5: Solve for x
    x = 85,482,602,493.82/279,128.29
  6. Step 6: Final answer
    x = 306,248.44

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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.