Home / 515,945.74-711,966.06-289,547.50

Finding the Fourth Proportional to 515,945.74, 711,966.06 and 289,547.50

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Solution

The fourth proportional to 515,945.74, 711,966.06 and 289,547.50 is: 399,553.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,945.74 : 711,966.06 = 289,547.50 : x
  2. Step 2: Convert to fraction form
    515,945.74/711,966.06 = 289,547.50/x
  3. Step 3: Cross multiply
    515,945.74x = 711,966.06 × 289,547.50
  4. Step 4: Simplify right side
    515,945.74x = 206,147,992,757.85
  5. Step 5: Solve for x
    x = 206,147,992,757.85/515,945.74
  6. Step 6: Final answer
    x = 399,553.63

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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.