Home / 621,571.20-857,457.72-392,412.48

Finding the Fourth Proportional to 621,571.20, 857,457.72 and 392,412.48

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Solution

The fourth proportional to 621,571.20, 857,457.72 and 392,412.48 is: 541,333.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,571.20 : 857,457.72 = 392,412.48 : x
  2. Step 2: Convert to fraction form
    621,571.20/857,457.72 = 392,412.48/x
  3. Step 3: Cross multiply
    621,571.20x = 857,457.72 × 392,412.48
  4. Step 4: Simplify right side
    621,571.20x = 336,477,110,400.35
  5. Step 5: Solve for x
    x = 336,477,110,400.35/621,571.20
  6. Step 6: Final answer
    x = 541,333.17

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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.