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Finding the Fourth Proportional to 279,436.88, 385,622.93 and 152,113.43

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Solution

The fourth proportional to 279,436.88, 385,622.93 and 152,113.43 is: 209,916.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,436.88 : 385,622.93 = 152,113.43 : x
  2. Step 2: Convert to fraction form
    279,436.88/385,622.93 = 152,113.43/x
  3. Step 3: Cross multiply
    279,436.88x = 385,622.93 × 152,113.43
  4. Step 4: Simplify right side
    279,436.88x = 58,658,425,021.12
  5. Step 5: Solve for x
    x = 58,658,425,021.12/279,436.88
  6. Step 6: Final answer
    x = 209,916.55

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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.