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Finding the Fourth Proportional to 515,511.15, 711,386.69 and 286,078.46

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Solution

The fourth proportional to 515,511.15, 711,386.69 and 286,078.46 is: 394,777.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,511.15 : 711,386.69 = 286,078.46 : x
  2. Step 2: Convert to fraction form
    515,511.15/711,386.69 = 286,078.46/x
  3. Step 3: Cross multiply
    515,511.15x = 711,386.69 × 286,078.46
  4. Step 4: Simplify right side
    515,511.15x = 203,512,403,752.37
  5. Step 5: Solve for x
    x = 203,512,403,752.37/515,511.15
  6. Step 6: Final answer
    x = 394,777.89

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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.