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Finding the Fourth Proportional to 439,690.40, 606,290.89 and 286,444.40

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Solution

The fourth proportional to 439,690.40, 606,290.89 and 286,444.40 is: 394,979.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,690.40 : 606,290.89 = 286,444.40 : x
  2. Step 2: Convert to fraction form
    439,690.40/606,290.89 = 286,444.40/x
  3. Step 3: Cross multiply
    439,690.40x = 606,290.89 × 286,444.40
  4. Step 4: Simplify right side
    439,690.40x = 173,668,628,779.29
  5. Step 5: Solve for x
    x = 173,668,628,779.29/439,690.40
  6. Step 6: Final answer
    x = 394,979.36

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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.