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Finding the Fourth Proportional to 318,978.62, 440,185.58 and 175,743.80

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Solution

The fourth proportional to 318,978.62, 440,185.58 and 175,743.80 is: 242,523.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,978.62 : 440,185.58 = 175,743.80 : x
  2. Step 2: Convert to fraction form
    318,978.62/440,185.58 = 175,743.80/x
  3. Step 3: Cross multiply
    318,978.62x = 440,185.58 × 175,743.80
  4. Step 4: Simplify right side
    318,978.62x = 77,359,886,534.40
  5. Step 5: Solve for x
    x = 77,359,886,534.40/318,978.62
  6. Step 6: Final answer
    x = 242,523.74

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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.