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Finding the Fourth Proportional to 543,707.80, 815,561.70 and 403,739.80

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Solution

The fourth proportional to 543,707.80, 815,561.70 and 403,739.80 is: 605,609.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,707.80 : 815,561.70 = 403,739.80 : x
  2. Step 2: Convert to fraction form
    543,707.80/815,561.70 = 403,739.80/x
  3. Step 3: Cross multiply
    543,707.80x = 815,561.70 × 403,739.80
  4. Step 4: Simplify right side
    543,707.80x = 329,274,717,645.66
  5. Step 5: Solve for x
    x = 329,274,717,645.66/543,707.80
  6. Step 6: Final answer
    x = 605,609.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.