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Finding the Fourth Proportional to 543,676.80, 815,624.55 and 455,540.70

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Solution

The fourth proportional to 543,676.80, 815,624.55 and 455,540.70 is: 683,402.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,676.80 : 815,624.55 = 455,540.70 : x
  2. Step 2: Convert to fraction form
    543,676.80/815,624.55 = 455,540.70/x
  3. Step 3: Cross multiply
    543,676.80x = 815,624.55 × 455,540.70
  4. Step 4: Simplify right side
    543,676.80x = 371,550,178,444.19
  5. Step 5: Solve for x
    x = 371,550,178,444.19/543,676.80
  6. Step 6: Final answer
    x = 683,402.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.