Home / 685,748.16-946,326.24-383,947.20

Finding the Fourth Proportional to 685,748.16, 946,326.24 and 383,947.20

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Solution

The fourth proportional to 685,748.16, 946,326.24 and 383,947.20 is: 529,843.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,748.16 : 946,326.24 = 383,947.20 : x
  2. Step 2: Convert to fraction form
    685,748.16/946,326.24 = 383,947.20/x
  3. Step 3: Cross multiply
    685,748.16x = 946,326.24 × 383,947.20
  4. Step 4: Simplify right side
    685,748.16x = 363,339,310,134.53
  5. Step 5: Solve for x
    x = 363,339,310,134.53/685,748.16
  6. Step 6: Final answer
    x = 529,843.65

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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.