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Finding the Fourth Proportional to 685,907.96, 946,542.76 and 379,983.70

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Solution

The fourth proportional to 685,907.96, 946,542.76 and 379,983.70 is: 524,371.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,907.96 : 946,542.76 = 379,983.70 : x
  2. Step 2: Convert to fraction form
    685,907.96/946,542.76 = 379,983.70/x
  3. Step 3: Cross multiply
    685,907.96x = 946,542.76 × 379,983.70
  4. Step 4: Simplify right side
    685,907.96x = 359,670,820,153.01
  5. Step 5: Solve for x
    x = 359,670,820,153.01/685,907.96
  6. Step 6: Final answer
    x = 524,371.84

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Double scale
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Similar ratio
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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.