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Finding the Fourth Proportional to 543,345.30, 815,127.30 and 455,209.20

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Solution

The fourth proportional to 543,345.30, 815,127.30 and 455,209.20 is: 682,905.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,345.30 : 815,127.30 = 455,209.20 : x
  2. Step 2: Convert to fraction form
    543,345.30/815,127.30 = 455,209.20/x
  3. Step 3: Cross multiply
    543,345.30x = 815,127.30 × 455,209.20
  4. Step 4: Simplify right side
    543,345.30x = 371,053,446,131.16
  5. Step 5: Solve for x
    x = 371,053,446,131.16/543,345.30
  6. Step 6: Final answer
    x = 682,905.41

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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.