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Finding the Fourth Proportional to 561,907.80, 775,345.77 and 320,200.56

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Solution

The fourth proportional to 561,907.80, 775,345.77 and 320,200.56 is: 441,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,907.80 : 775,345.77 = 320,200.56 : x
  2. Step 2: Convert to fraction form
    561,907.80/775,345.77 = 320,200.56/x
  3. Step 3: Cross multiply
    561,907.80x = 775,345.77 × 320,200.56
  4. Step 4: Simplify right side
    561,907.80x = 248,266,149,747.63
  5. Step 5: Solve for x
    x = 248,266,149,747.63/561,907.80
  6. Step 6: Final answer
    x = 441,827.20

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1.5x scale

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.