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Finding the Fourth Proportional to 378,991.80, 568,443.60 and 98,530.92

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Solution

The fourth proportional to 378,991.80, 568,443.60 and 98,530.92 is: 147,784.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,991.80 : 568,443.60 = 98,530.92 : x
  2. Step 2: Convert to fraction form
    378,991.80/568,443.60 = 98,530.92/x
  3. Step 3: Cross multiply
    378,991.80x = 568,443.60 × 98,530.92
  4. Step 4: Simplify right side
    378,991.80x = 56,009,270,876.11
  5. Step 5: Solve for x
    x = 56,009,270,876.11/378,991.80
  6. Step 6: Final answer
    x = 147,784.91

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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.