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Finding the Fourth Proportional to 395,389.12, 545,676.12 and 225,648.76

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Solution

The fourth proportional to 395,389.12, 545,676.12 and 225,648.76 is: 311,417.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,389.12 : 545,676.12 = 225,648.76 : x
  2. Step 2: Convert to fraction form
    395,389.12/545,676.12 = 225,648.76/x
  3. Step 3: Cross multiply
    395,389.12x = 545,676.12 × 225,648.76
  4. Step 4: Simplify right side
    395,389.12x = 123,131,139,839.61
  5. Step 5: Solve for x
    x = 123,131,139,839.61/395,389.12
  6. Step 6: Final answer
    x = 311,417.62

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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.