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Finding the Fourth Proportional to 685,257.86, 945,644.38 and 379,327.76

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Solution

The fourth proportional to 685,257.86, 945,644.38 and 379,327.76 is: 523,465.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,257.86 : 945,644.38 = 379,327.76 : x
  2. Step 2: Convert to fraction form
    685,257.86/945,644.38 = 379,327.76/x
  3. Step 3: Cross multiply
    685,257.86x = 945,644.38 × 379,327.76
  4. Step 4: Simplify right side
    685,257.86x = 358,709,164,421.99
  5. Step 5: Solve for x
    x = 358,709,164,421.99/685,257.86
  6. Step 6: Final answer
    x = 523,465.96

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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.