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Finding the Fourth Proportional to 353,525.10, 530,287.65 and 143,313.90

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Solution

The fourth proportional to 353,525.10, 530,287.65 and 143,313.90 is: 214,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,525.10 : 530,287.65 = 143,313.90 : x
  2. Step 2: Convert to fraction form
    353,525.10/530,287.65 = 143,313.90/x
  3. Step 3: Cross multiply
    353,525.10x = 530,287.65 × 143,313.90
  4. Step 4: Simplify right side
    353,525.10x = 75,997,591,243.34
  5. Step 5: Solve for x
    x = 75,997,591,243.34/353,525.10
  6. Step 6: Final answer
    x = 214,970.85

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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.