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Finding the Fourth Proportional to 661,508.82, 912,771.51 and 389,630.85

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Solution

The fourth proportional to 661,508.82, 912,771.51 and 389,630.85 is: 537,625.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,508.82 : 912,771.51 = 389,630.85 : x
  2. Step 2: Convert to fraction form
    661,508.82/912,771.51 = 389,630.85/x
  3. Step 3: Cross multiply
    661,508.82x = 912,771.51 × 389,630.85
  4. Step 4: Simplify right side
    661,508.82x = 355,643,934,733.23
  5. Step 5: Solve for x
    x = 355,643,934,733.23/661,508.82
  6. Step 6: Final answer
    x = 537,625.39

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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.