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Finding the Fourth Proportional to 279,687.68, 385,955.28 and 152,355.68

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Solution

The fourth proportional to 279,687.68, 385,955.28 and 152,355.68 is: 210,243.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,687.68 : 385,955.28 = 152,355.68 : x
  2. Step 2: Convert to fraction form
    279,687.68/385,955.28 = 152,355.68/x
  3. Step 3: Cross multiply
    279,687.68x = 385,955.28 × 152,355.68
  4. Step 4: Simplify right side
    279,687.68x = 58,802,479,133.99
  5. Step 5: Solve for x
    x = 58,802,479,133.99/279,687.68
  6. Step 6: Final answer
    x = 210,243.37

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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.