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Finding the Fourth Proportional to 578,745.12, 798,659.65 and 320,621.52

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Solution

The fourth proportional to 578,745.12, 798,659.65 and 320,621.52 is: 442,452.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,745.12 : 798,659.65 = 320,621.52 : x
  2. Step 2: Convert to fraction form
    578,745.12/798,659.65 = 320,621.52/x
  3. Step 3: Cross multiply
    578,745.12x = 798,659.65 × 320,621.52
  4. Step 4: Simplify right side
    578,745.12x = 256,067,470,945.67
  5. Step 5: Solve for x
    x = 256,067,470,945.67/578,745.12
  6. Step 6: Final answer
    x = 442,452.92

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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.