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Finding the Fourth Proportional to 661,383.26, 912,903.13 and 431,975.62

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Solution

The fourth proportional to 661,383.26, 912,903.13 and 431,975.62 is: 596,253.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,383.26 : 912,903.13 = 431,975.62 : x
  2. Step 2: Convert to fraction form
    661,383.26/912,903.13 = 431,975.62/x
  3. Step 3: Cross multiply
    661,383.26x = 912,903.13 × 431,975.62
  4. Step 4: Simplify right side
    661,383.26x = 394,351,895,581.69
  5. Step 5: Solve for x
    x = 394,351,895,581.69/661,383.26
  6. Step 6: Final answer
    x = 596,253.22

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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.