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Finding the Fourth Proportional to 406,986.72, 560,994.55 and 320,805.96

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Solution

The fourth proportional to 406,986.72, 560,994.55 and 320,805.96 is: 442,202.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,986.72 : 560,994.55 = 320,805.96 : x
  2. Step 2: Convert to fraction form
    406,986.72/560,994.55 = 320,805.96/x
  3. Step 3: Cross multiply
    406,986.72x = 560,994.55 × 320,805.96
  4. Step 4: Simplify right side
    406,986.72x = 179,970,395,167.52
  5. Step 5: Solve for x
    x = 179,970,395,167.52/406,986.72
  6. Step 6: Final answer
    x = 442,202.13

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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.