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Finding the Fourth Proportional to 685,162.79, 945,500.51 and 379,239.76

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Solution

The fourth proportional to 685,162.79, 945,500.51 and 379,239.76 is: 523,337.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,162.79 : 945,500.51 = 379,239.76 : x
  2. Step 2: Convert to fraction form
    685,162.79/945,500.51 = 379,239.76/x
  3. Step 3: Cross multiply
    685,162.79x = 945,500.51 × 379,239.76
  4. Step 4: Simplify right side
    685,162.79x = 358,571,388,622.25
  5. Step 5: Solve for x
    x = 358,571,388,622.25/685,162.79
  6. Step 6: Final answer
    x = 523,337.51

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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.