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Finding the Fourth Proportional to 578,995.82, 798,990.86 and 320,876.52

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Solution

The fourth proportional to 578,995.82, 798,990.86 and 320,876.52 is: 442,796.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,995.82 : 798,990.86 = 320,876.52 : x
  2. Step 2: Convert to fraction form
    578,995.82/798,990.86 = 320,876.52/x
  3. Step 3: Cross multiply
    578,995.82x = 798,990.86 × 320,876.52
  4. Step 4: Simplify right side
    578,995.82x = 256,377,406,668.61
  5. Step 5: Solve for x
    x = 256,377,406,668.61/578,995.82
  6. Step 6: Final answer
    x = 442,796.65

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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.