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Finding the Fourth Proportional to 515,705.28, 711,637.58 and 286,244.52

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Solution

The fourth proportional to 515,705.28, 711,637.58 and 286,244.52 is: 394,997.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,705.28 : 711,637.58 = 286,244.52 : x
  2. Step 2: Convert to fraction form
    515,705.28/711,637.58 = 286,244.52/x
  3. Step 3: Cross multiply
    515,705.28x = 711,637.58 × 286,244.52
  4. Step 4: Simplify right side
    515,705.28x = 203,702,357,501.06
  5. Step 5: Solve for x
    x = 203,702,357,501.06/515,705.28
  6. Step 6: Final answer
    x = 394,997.62

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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.