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Finding the Fourth Proportional to 685,855.94, 946,470.98 and 379,931.40

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Solution

The fourth proportional to 685,855.94, 946,470.98 and 379,931.40 is: 524,299.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,855.94 : 946,470.98 = 379,931.40 : x
  2. Step 2: Convert to fraction form
    685,855.94/946,470.98 = 379,931.40/x
  3. Step 3: Cross multiply
    685,855.94x = 946,470.98 × 379,931.40
  4. Step 4: Simplify right side
    685,855.94x = 359,594,042,591.12
  5. Step 5: Solve for x
    x = 359,594,042,591.12/685,855.94
  6. Step 6: Final answer
    x = 524,299.67

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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.