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Finding the Fourth Proportional to 587,136.60, 810,234.79 and 345,434.74

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Solution

The fourth proportional to 587,136.60, 810,234.79 and 345,434.74 is: 476,691.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,136.60 : 810,234.79 = 345,434.74 : x
  2. Step 2: Convert to fraction form
    587,136.60/810,234.79 = 345,434.74/x
  3. Step 3: Cross multiply
    587,136.60x = 810,234.79 × 345,434.74
  4. Step 4: Simplify right side
    587,136.60x = 279,883,241,133.43
  5. Step 5: Solve for x
    x = 279,883,241,133.43/587,136.60
  6. Step 6: Final answer
    x = 476,691.87

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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.