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Finding the Fourth Proportional to 688,645.80, 950,059.08 and 398,203.92

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Solution

The fourth proportional to 688,645.80, 950,059.08 and 398,203.92 is: 549,364.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,645.80 : 950,059.08 = 398,203.92 : x
  2. Step 2: Convert to fraction form
    688,645.80/950,059.08 = 398,203.92/x
  3. Step 3: Cross multiply
    688,645.80x = 950,059.08 × 398,203.92
  4. Step 4: Simplify right side
    688,645.80x = 378,317,249,887.59
  5. Step 5: Solve for x
    x = 378,317,249,887.59/688,645.80
  6. Step 6: Final answer
    x = 549,364.06

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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.