Home / 515,949.39-711,986.19-286,521.21

Finding the Fourth Proportional to 515,949.39, 711,986.19 and 286,521.21

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Solution

The fourth proportional to 515,949.39, 711,986.19 and 286,521.21 is: 395,385.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,949.39 : 711,986.19 = 286,521.21 : x
  2. Step 2: Convert to fraction form
    515,949.39/711,986.19 = 286,521.21/x
  3. Step 3: Cross multiply
    515,949.39x = 711,986.19 × 286,521.21
  4. Step 4: Simplify right side
    515,949.39x = 203,999,141,102.16
  5. Step 5: Solve for x
    x = 203,999,141,102.16/515,949.39
  6. Step 6: Final answer
    x = 395,385.96

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Double scale
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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.