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Finding the Fourth Proportional to 321,916.80, 482,875.20 and 156,028.80

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Solution

The fourth proportional to 321,916.80, 482,875.20 and 156,028.80 is: 234,043.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,916.80 : 482,875.20 = 156,028.80 : x
  2. Step 2: Convert to fraction form
    321,916.80/482,875.20 = 156,028.80/x
  3. Step 3: Cross multiply
    321,916.80x = 482,875.20 × 156,028.80
  4. Step 4: Simplify right side
    321,916.80x = 75,342,438,005.76
  5. Step 5: Solve for x
    x = 75,342,438,005.76/321,916.80
  6. Step 6: Final answer
    x = 234,043.20

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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.