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Finding the Fourth Proportional to 353,625.60, 530,438.40 and 143,270.40

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Solution

The fourth proportional to 353,625.60, 530,438.40 and 143,270.40 is: 214,905.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,625.60 : 530,438.40 = 143,270.40 : x
  2. Step 2: Convert to fraction form
    353,625.60/530,438.40 = 143,270.40/x
  3. Step 3: Cross multiply
    353,625.60x = 530,438.40 × 143,270.40
  4. Step 4: Simplify right side
    353,625.60x = 75,996,121,743.36
  5. Step 5: Solve for x
    x = 75,996,121,743.36/353,625.60
  6. Step 6: Final answer
    x = 214,905.60

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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.