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Finding the Fourth Proportional to 691,741, 954,602.58 and 389,935

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Solution

The fourth proportional to 691,741, 954,602.58 and 389,935 is: 538,110.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,741 : 954,602.58 = 389,935 : x
  2. Step 2: Convert to fraction form
    691,741/954,602.58 = 389,935/x
  3. Step 3: Cross multiply
    691,741x = 954,602.58 × 389,935
  4. Step 4: Simplify right side
    691,741x = 372,232,957,032.30
  5. Step 5: Solve for x
    x = 372,232,957,032.30/691,741
  6. Step 6: Final answer
    x = 538,110.30

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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.