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Finding the Fourth Proportional to 321,710.40, 482,565.60 and 269,611.20

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Solution

The fourth proportional to 321,710.40, 482,565.60 and 269,611.20 is: 404,416.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,710.40 : 482,565.60 = 269,611.20 : x
  2. Step 2: Convert to fraction form
    321,710.40/482,565.60 = 269,611.20/x
  3. Step 3: Cross multiply
    321,710.40x = 482,565.60 × 269,611.20
  4. Step 4: Simplify right side
    321,710.40x = 130,105,090,494.72
  5. Step 5: Solve for x
    x = 130,105,090,494.72/321,710.40
  6. Step 6: Final answer
    x = 404,416.80

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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.