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Finding the Fourth Proportional to 353,631.60, 530,447.40 and 143,276.40

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Solution

The fourth proportional to 353,631.60, 530,447.40 and 143,276.40 is: 214,914.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,631.60 : 530,447.40 = 143,276.40 : x
  2. Step 2: Convert to fraction form
    353,631.60/530,447.40 = 143,276.40/x
  3. Step 3: Cross multiply
    353,631.60x = 530,447.40 × 143,276.40
  4. Step 4: Simplify right side
    353,631.60x = 76,000,593,861.36
  5. Step 5: Solve for x
    x = 76,000,593,861.36/353,631.60
  6. Step 6: Final answer
    x = 214,914.60

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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.