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Finding the Fourth Proportional to 543,685.30, 815,637.30 and 455,549.20

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Solution

The fourth proportional to 543,685.30, 815,637.30 and 455,549.20 is: 683,415.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,685.30 : 815,637.30 = 455,549.20 : x
  2. Step 2: Convert to fraction form
    543,685.30/815,637.30 = 455,549.20/x
  3. Step 3: Cross multiply
    543,685.30x = 815,637.30 × 455,549.20
  4. Step 4: Simplify right side
    543,685.30x = 371,562,919,505.16
  5. Step 5: Solve for x
    x = 371,562,919,505.16/543,685.30
  6. Step 6: Final answer
    x = 683,415.42

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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.