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Finding the Fourth Proportional to 718,381.50, 991,347.93 and 396,086.04

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Solution

The fourth proportional to 718,381.50, 991,347.93 and 396,086.04 is: 546,588.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,381.50 : 991,347.93 = 396,086.04 : x
  2. Step 2: Convert to fraction form
    718,381.50/991,347.93 = 396,086.04/x
  3. Step 3: Cross multiply
    718,381.50x = 991,347.93 × 396,086.04
  4. Step 4: Simplify right side
    718,381.50x = 392,659,075,855.90
  5. Step 5: Solve for x
    x = 392,659,075,855.90/718,381.50
  6. Step 6: Final answer
    x = 546,588.52

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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.