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Finding the Fourth Proportional to 578,726.75, 798,919.82 and 385,456.10

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Solution

The fourth proportional to 578,726.75, 798,919.82 and 385,456.10 is: 532,113.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,726.75 : 798,919.82 = 385,456.10 : x
  2. Step 2: Convert to fraction form
    578,726.75/798,919.82 = 385,456.10/x
  3. Step 3: Cross multiply
    578,726.75x = 798,919.82 × 385,456.10
  4. Step 4: Simplify right side
    578,726.75x = 307,948,512,108.02
  5. Step 5: Solve for x
    x = 307,948,512,108.02/578,726.75
  6. Step 6: Final answer
    x = 532,113.84

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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.