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Finding the Fourth Proportional to 685,151.33, 945,484.71 and 379,228.30

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Solution

The fourth proportional to 685,151.33, 945,484.71 and 379,228.30 is: 523,321.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,151.33 : 945,484.71 = 379,228.30 : x
  2. Step 2: Convert to fraction form
    685,151.33/945,484.71 = 379,228.30/x
  3. Step 3: Cross multiply
    685,151.33x = 945,484.71 × 379,228.30
  4. Step 4: Simplify right side
    685,151.33x = 358,554,555,463.48
  5. Step 5: Solve for x
    x = 358,554,555,463.48/685,151.33
  6. Step 6: Final answer
    x = 523,321.70

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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.