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Finding the Fourth Proportional to 685,869.96, 946,490.28 and 379,945.42

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Solution

The fourth proportional to 685,869.96, 946,490.28 and 379,945.42 is: 524,318.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,869.96 : 946,490.28 = 379,945.42 : x
  2. Step 2: Convert to fraction form
    685,869.96/946,490.28 = 379,945.42/x
  3. Step 3: Cross multiply
    685,869.96x = 946,490.28 × 379,945.42
  4. Step 4: Simplify right side
    685,869.96x = 359,614,646,960.52
  5. Step 5: Solve for x
    x = 359,614,646,960.52/685,869.96
  6. Step 6: Final answer
    x = 524,318.99

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Double scale
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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.