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Finding the Fourth Proportional to 543,343.80, 815,125.05 and 455,207.70

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Solution

The fourth proportional to 543,343.80, 815,125.05 and 455,207.70 is: 682,903.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,343.80 : 815,125.05 = 455,207.70 : x
  2. Step 2: Convert to fraction form
    543,343.80/815,125.05 = 455,207.70/x
  3. Step 3: Cross multiply
    543,343.80x = 815,125.05 × 455,207.70
  4. Step 4: Simplify right side
    543,343.80x = 371,051,199,222.89
  5. Step 5: Solve for x
    x = 371,051,199,222.89/543,343.80
  6. Step 6: Final answer
    x = 682,903.16

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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.