Home / 685,927.20-946,349.28-399,385.92

Finding the Fourth Proportional to 685,927.20, 946,349.28 and 399,385.92

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Solution

The fourth proportional to 685,927.20, 946,349.28 and 399,385.92 is: 551,018.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,927.20 : 946,349.28 = 399,385.92 : x
  2. Step 2: Convert to fraction form
    685,927.20/946,349.28 = 399,385.92/x
  3. Step 3: Cross multiply
    685,927.20x = 946,349.28 × 399,385.92
  4. Step 4: Simplify right side
    685,927.20x = 377,958,577,834.14
  5. Step 5: Solve for x
    x = 377,958,577,834.14/685,927.20
  6. Step 6: Final answer
    x = 551,018.50

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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.