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Finding the Fourth Proportional to 385,839.99, 531,988.70 and 283,554

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Solution

The fourth proportional to 385,839.99, 531,988.70 and 283,554 is: 390,958.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,839.99 : 531,988.70 = 283,554 : x
  2. Step 2: Convert to fraction form
    385,839.99/531,988.70 = 283,554/x
  3. Step 3: Cross multiply
    385,839.99x = 531,988.70 × 283,554
  4. Step 4: Simplify right side
    385,839.99x = 150,847,522,422.03
  5. Step 5: Solve for x
    x = 150,847,522,422.03/385,839.99
  6. Step 6: Final answer
    x = 390,958.76

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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.