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Finding the Fourth Proportional to 515,276.40, 711,085.71 and 285,848.70

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Solution

The fourth proportional to 515,276.40, 711,085.71 and 285,848.70 is: 394,473.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,276.40 : 711,085.71 = 285,848.70 : x
  2. Step 2: Convert to fraction form
    515,276.40/711,085.71 = 285,848.70/x
  3. Step 3: Cross multiply
    515,276.40x = 711,085.71 × 285,848.70
  4. Step 4: Simplify right side
    515,276.40x = 203,262,925,792.08
  5. Step 5: Solve for x
    x = 203,262,925,792.08/515,276.40
  6. Step 6: Final answer
    x = 394,473.58

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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.