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Finding the Fourth Proportional to 707,408.51, 976,241.23 and 385,136.30

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Solution

The fourth proportional to 707,408.51, 976,241.23 and 385,136.30 is: 531,497.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,408.51 : 976,241.23 = 385,136.30 : x
  2. Step 2: Convert to fraction form
    707,408.51/976,241.23 = 385,136.30/x
  3. Step 3: Cross multiply
    707,408.51x = 976,241.23 × 385,136.30
  4. Step 4: Simplify right side
    707,408.51x = 375,985,936,707.41
  5. Step 5: Solve for x
    x = 375,985,936,707.41/707,408.51
  6. Step 6: Final answer
    x = 531,497.62

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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.