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Finding the Fourth Proportional to 685,505.67, 945,986.28 and 379,575.47

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Solution

The fourth proportional to 685,505.67, 945,986.28 and 379,575.47 is: 523,807.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,505.67 : 945,986.28 = 379,575.47 : x
  2. Step 2: Convert to fraction form
    685,505.67/945,986.28 = 379,575.47/x
  3. Step 3: Cross multiply
    685,505.67x = 945,986.28 × 379,575.47
  4. Step 4: Simplify right side
    685,505.67x = 359,073,182,114.62
  5. Step 5: Solve for x
    x = 359,073,182,114.62/685,505.67
  6. Step 6: Final answer
    x = 523,807.75

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1.5x scale

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.