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Finding the Fourth Proportional to 485,907.12, 728,860.56 and 260,958

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Solution

The fourth proportional to 485,907.12, 728,860.56 and 260,958 is: 391,436.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,907.12 : 728,860.56 = 260,958 : x
  2. Step 2: Convert to fraction form
    485,907.12/728,860.56 = 260,958/x
  3. Step 3: Cross multiply
    485,907.12x = 728,860.56 × 260,958
  4. Step 4: Simplify right side
    485,907.12x = 190,201,994,016.48
  5. Step 5: Solve for x
    x = 190,201,994,016.48/485,907.12
  6. Step 6: Final answer
    x = 391,436.94

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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.