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Finding the Fourth Proportional to 515,613.15, 711,535.41 and 286,157.07

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Solution

The fourth proportional to 515,613.15, 711,535.41 and 286,157.07 is: 394,890.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,613.15 : 711,535.41 = 286,157.07 : x
  2. Step 2: Convert to fraction form
    515,613.15/711,535.41 = 286,157.07/x
  3. Step 3: Cross multiply
    515,613.15x = 711,535.41 × 286,157.07
  4. Step 4: Simplify right side
    515,613.15x = 203,610,888,126.85
  5. Step 5: Solve for x
    x = 203,610,888,126.85/515,613.15
  6. Step 6: Final answer
    x = 394,890.80

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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.