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Finding the Fourth Proportional to 633,980.38, 874,982.58 and 392,340.82

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Solution

The fourth proportional to 633,980.38, 874,982.58 and 392,340.82 is: 541,485.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,980.38 : 874,982.58 = 392,340.82 : x
  2. Step 2: Convert to fraction form
    633,980.38/874,982.58 = 392,340.82/x
  3. Step 3: Cross multiply
    633,980.38x = 874,982.58 × 392,340.82
  4. Step 4: Simplify right side
    633,980.38x = 343,291,382,922.92
  5. Step 5: Solve for x
    x = 343,291,382,922.92/633,980.38
  6. Step 6: Final answer
    x = 541,485.82

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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.