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Finding the Fourth Proportional to 685,784.70, 946,310.72 and 379,852.88

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Solution

The fourth proportional to 685,784.70, 946,310.72 and 379,852.88 is: 524,156.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,784.70 : 946,310.72 = 379,852.88 : x
  2. Step 2: Convert to fraction form
    685,784.70/946,310.72 = 379,852.88/x
  3. Step 3: Cross multiply
    685,784.70x = 946,310.72 × 379,852.88
  4. Step 4: Simplify right side
    685,784.70x = 359,458,845,736.06
  5. Step 5: Solve for x
    x = 359,458,845,736.06/685,784.70
  6. Step 6: Final answer
    x = 524,156.99

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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.