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Finding the Fourth Proportional to 661,316.22, 912,249.27 and 431,548.38

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Solution

The fourth proportional to 661,316.22, 912,249.27 and 431,548.38 is: 595,297.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,316.22 : 912,249.27 = 431,548.38 : x
  2. Step 2: Convert to fraction form
    661,316.22/912,249.27 = 431,548.38/x
  3. Step 3: Cross multiply
    661,316.22x = 912,249.27 × 431,548.38
  4. Step 4: Simplify right side
    661,316.22x = 393,679,694,624.68
  5. Step 5: Solve for x
    x = 393,679,694,624.68/661,316.22
  6. Step 6: Final answer
    x = 595,297.20

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Double scale
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Similar ratio
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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.