Home / 515,939.74-711,957.78-289,541.50

Finding the Fourth Proportional to 515,939.74, 711,957.78 and 289,541.50

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Solution

The fourth proportional to 515,939.74, 711,957.78 and 289,541.50 is: 399,545.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,939.74 : 711,957.78 = 289,541.50 : x
  2. Step 2: Convert to fraction form
    515,939.74/711,957.78 = 289,541.50/x
  3. Step 3: Cross multiply
    515,939.74x = 711,957.78 × 289,541.50
  4. Step 4: Simplify right side
    515,939.74x = 206,141,323,557.87
  5. Step 5: Solve for x
    x = 206,141,323,557.87/515,939.74
  6. Step 6: Final answer
    x = 399,545.35

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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.