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Finding the Fourth Proportional to 515,613.60, 774,003.60 and 278,834.40

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Solution

The fourth proportional to 515,613.60, 774,003.60 and 278,834.40 is: 418,566.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,613.60 : 774,003.60 = 278,834.40 : x
  2. Step 2: Convert to fraction form
    515,613.60/774,003.60 = 278,834.40/x
  3. Step 3: Cross multiply
    515,613.60x = 774,003.60 × 278,834.40
  4. Step 4: Simplify right side
    515,613.60x = 215,818,829,403.84
  5. Step 5: Solve for x
    x = 215,818,829,403.84/515,613.60
  6. Step 6: Final answer
    x = 418,566.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.