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Finding the Fourth Proportional to 488,612.78, 674,323.82 and 314,338.60

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Solution

The fourth proportional to 488,612.78, 674,323.82 and 314,338.60 is: 433,811.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,612.78 : 674,323.82 = 314,338.60 : x
  2. Step 2: Convert to fraction form
    488,612.78/674,323.82 = 314,338.60/x
  3. Step 3: Cross multiply
    488,612.78x = 674,323.82 × 314,338.60
  4. Step 4: Simplify right side
    488,612.78x = 211,966,005,525.45
  5. Step 5: Solve for x
    x = 211,966,005,525.45/488,612.78
  6. Step 6: Final answer
    x = 433,811.83

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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.