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Finding the Fourth Proportional to 279,147, 385,058.70 and 165,963

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Solution

The fourth proportional to 279,147, 385,058.70 and 165,963 is: 228,931.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,147 : 385,058.70 = 165,963 : x
  2. Step 2: Convert to fraction form
    279,147/385,058.70 = 165,963/x
  3. Step 3: Cross multiply
    279,147x = 385,058.70 × 165,963
  4. Step 4: Simplify right side
    279,147x = 63,905,497,028.10
  5. Step 5: Solve for x
    x = 63,905,497,028.10/279,147
  6. Step 6: Final answer
    x = 228,931.34

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1.5x scale

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.