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Finding the Fourth Proportional to 578,995.32, 798,990.17 and 320,876.01

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Solution

The fourth proportional to 578,995.32, 798,990.17 and 320,876.01 is: 442,795.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,995.32 : 798,990.17 = 320,876.01 : x
  2. Step 2: Convert to fraction form
    578,995.32/798,990.17 = 320,876.01/x
  3. Step 3: Cross multiply
    578,995.32x = 798,990.17 × 320,876.01
  4. Step 4: Simplify right side
    578,995.32x = 256,376,776,174.44
  5. Step 5: Solve for x
    x = 256,376,776,174.44/578,995.32
  6. Step 6: Final answer
    x = 442,795.94

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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.