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Finding the Fourth Proportional to 321,564.60, 482,001.30 and 121,807.80

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Solution

The fourth proportional to 321,564.60, 482,001.30 and 121,807.80 is: 182,580.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,564.60 : 482,001.30 = 121,807.80 : x
  2. Step 2: Convert to fraction form
    321,564.60/482,001.30 = 121,807.80/x
  3. Step 3: Cross multiply
    321,564.60x = 482,001.30 × 121,807.80
  4. Step 4: Simplify right side
    321,564.60x = 58,711,517,950.14
  5. Step 5: Solve for x
    x = 58,711,517,950.14/321,564.60
  6. Step 6: Final answer
    x = 182,580.79

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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.