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Finding the Fourth Proportional to 515,521.89, 711,424.64 and 286,094.66

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Solution

The fourth proportional to 515,521.89, 711,424.64 and 286,094.66 is: 394,813.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,521.89 : 711,424.64 = 286,094.66 : x
  2. Step 2: Convert to fraction form
    515,521.89/711,424.64 = 286,094.66/x
  3. Step 3: Cross multiply
    515,521.89x = 711,424.64 × 286,094.66
  4. Step 4: Simplify right side
    515,521.89x = 203,534,787,654.54
  5. Step 5: Solve for x
    x = 203,534,787,654.54/515,521.89
  6. Step 6: Final answer
    x = 394,813.08

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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.