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Finding the Fourth Proportional to 718,347.94, 991,299.67 and 396,058.41

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Solution

The fourth proportional to 718,347.94, 991,299.67 and 396,058.41 is: 546,549.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,347.94 : 991,299.67 = 396,058.41 : x
  2. Step 2: Convert to fraction form
    718,347.94/991,299.67 = 396,058.41/x
  3. Step 3: Cross multiply
    718,347.94x = 991,299.67 × 396,058.41
  4. Step 4: Simplify right side
    718,347.94x = 392,612,570,143.58
  5. Step 5: Solve for x
    x = 392,612,570,143.58/718,347.94
  6. Step 6: Final answer
    x = 546,549.31

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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.