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Finding the Fourth Proportional to 215,810.60, 323,715.90 and 214,428.20

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Solution

The fourth proportional to 215,810.60, 323,715.90 and 214,428.20 is: 321,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,810.60 : 323,715.90 = 214,428.20 : x
  2. Step 2: Convert to fraction form
    215,810.60/323,715.90 = 214,428.20/x
  3. Step 3: Cross multiply
    215,810.60x = 323,715.90 × 214,428.20
  4. Step 4: Simplify right side
    215,810.60x = 69,413,817,748.38
  5. Step 5: Solve for x
    x = 69,413,817,748.38/215,810.60
  6. Step 6: Final answer
    x = 321,642.30

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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.