Home / 663,029.79-915,091.20-391,164.51

Finding the Fourth Proportional to 663,029.79, 915,091.20 and 391,164.51

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Solution

The fourth proportional to 663,029.79, 915,091.20 and 391,164.51 is: 539,871.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,029.79 : 915,091.20 = 391,164.51 : x
  2. Step 2: Convert to fraction form
    663,029.79/915,091.20 = 391,164.51/x
  3. Step 3: Cross multiply
    663,029.79x = 915,091.20 × 391,164.51
  4. Step 4: Simplify right side
    663,029.79x = 357,951,200,853.31
  5. Step 5: Solve for x
    x = 357,951,200,853.31/663,029.79
  6. Step 6: Final answer
    x = 539,871.97

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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.