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Finding the Fourth Proportional to 321,807.40, 482,883.90 and 134,837.80

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Solution

The fourth proportional to 321,807.40, 482,883.90 and 134,837.80 is: 202,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,807.40 : 482,883.90 = 134,837.80 : x
  2. Step 2: Convert to fraction form
    321,807.40/482,883.90 = 134,837.80/x
  3. Step 3: Cross multiply
    321,807.40x = 482,883.90 × 134,837.80
  4. Step 4: Simplify right side
    321,807.40x = 65,111,002,731.42
  5. Step 5: Solve for x
    x = 65,111,002,731.42/321,807.40
  6. Step 6: Final answer
    x = 202,329.10

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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.