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Finding the Fourth Proportional to 545,781.62, 818,820.14 and 309,290.38

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Solution

The fourth proportional to 545,781.62, 818,820.14 and 309,290.38 is: 464,019.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,781.62 : 818,820.14 = 309,290.38 : x
  2. Step 2: Convert to fraction form
    545,781.62/818,820.14 = 309,290.38/x
  3. Step 3: Cross multiply
    545,781.62x = 818,820.14 × 309,290.38
  4. Step 4: Simplify right side
    545,781.62x = 253,253,192,252.25
  5. Step 5: Solve for x
    x = 253,253,192,252.25/545,781.62
  6. Step 6: Final answer
    x = 464,019.28

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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.