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Finding the Fourth Proportional to 551,078.52, 760,488.06 and 309,361.56

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Solution

The fourth proportional to 551,078.52, 760,488.06 and 309,361.56 is: 426,918.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,078.52 : 760,488.06 = 309,361.56 : x
  2. Step 2: Convert to fraction form
    551,078.52/760,488.06 = 309,361.56/x
  3. Step 3: Cross multiply
    551,078.52x = 760,488.06 × 309,361.56
  4. Step 4: Simplify right side
    551,078.52x = 235,265,772,602.97
  5. Step 5: Solve for x
    x = 235,265,772,602.97/551,078.52
  6. Step 6: Final answer
    x = 426,918.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.