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Finding the Fourth Proportional to 578,820.69, 798,778.62 and 320,705.55

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Solution

The fourth proportional to 578,820.69, 798,778.62 and 320,705.55 is: 442,577.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,820.69 : 798,778.62 = 320,705.55 : x
  2. Step 2: Convert to fraction form
    578,820.69/798,778.62 = 320,705.55/x
  3. Step 3: Cross multiply
    578,820.69x = 798,778.62 × 320,705.55
  4. Step 4: Simplify right side
    578,820.69x = 256,172,736,655.34
  5. Step 5: Solve for x
    x = 256,172,736,655.34/578,820.69
  6. Step 6: Final answer
    x = 442,577.02

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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.