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Finding the Fourth Proportional to 685,218.92, 945,590.65 and 379,288.73

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Solution

The fourth proportional to 685,218.92, 945,590.65 and 379,288.73 is: 523,412.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,218.92 : 945,590.65 = 379,288.73 : x
  2. Step 2: Convert to fraction form
    685,218.92/945,590.65 = 379,288.73/x
  3. Step 3: Cross multiply
    685,218.92x = 945,590.65 × 379,288.73
  4. Step 4: Simplify right side
    685,218.92x = 358,651,879,576.46
  5. Step 5: Solve for x
    x = 358,651,879,576.46/685,218.92
  6. Step 6: Final answer
    x = 523,412.11

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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.