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Finding the Fourth Proportional to 318,644.70, 439,729.56 and 175,404

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Solution

The fourth proportional to 318,644.70, 439,729.56 and 175,404 is: 242,057.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,644.70 : 439,729.56 = 175,404 : x
  2. Step 2: Convert to fraction form
    318,644.70/439,729.56 = 175,404/x
  3. Step 3: Cross multiply
    318,644.70x = 439,729.56 × 175,404
  4. Step 4: Simplify right side
    318,644.70x = 77,130,323,742.24
  5. Step 5: Solve for x
    x = 77,130,323,742.24/318,644.70
  6. Step 6: Final answer
    x = 242,057.45

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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.