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Finding the Fourth Proportional to 279,193.68, 385,285.53 and 151,869.78

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Solution

The fourth proportional to 279,193.68, 385,285.53 and 151,869.78 is: 209,579.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,193.68 : 385,285.53 = 151,869.78 : x
  2. Step 2: Convert to fraction form
    279,193.68/385,285.53 = 151,869.78/x
  3. Step 3: Cross multiply
    279,193.68x = 385,285.53 × 151,869.78
  4. Step 4: Simplify right side
    279,193.68x = 58,513,228,678.28
  5. Step 5: Solve for x
    x = 58,513,228,678.28/279,193.68
  6. Step 6: Final answer
    x = 209,579.35

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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.