Home / 515,949.29-711,986.09-286,521.15

Finding the Fourth Proportional to 515,949.29, 711,986.09 and 286,521.15

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Solution

The fourth proportional to 515,949.29, 711,986.09 and 286,521.15 is: 395,385.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,949.29 : 711,986.09 = 286,521.15 : x
  2. Step 2: Convert to fraction form
    515,949.29/711,986.09 = 286,521.15/x
  3. Step 3: Cross multiply
    515,949.29x = 711,986.09 × 286,521.15
  4. Step 4: Simplify right side
    515,949.29x = 203,999,071,731.99
  5. Step 5: Solve for x
    x = 203,999,071,731.99/515,949.29
  6. Step 6: Final answer
    x = 395,385.89

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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.