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Finding the Fourth Proportional to 354,145.20, 530,440.20 and 307,489.20

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Solution

The fourth proportional to 354,145.20, 530,440.20 and 307,489.20 is: 460,558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,145.20 : 530,440.20 = 307,489.20 : x
  2. Step 2: Convert to fraction form
    354,145.20/530,440.20 = 307,489.20/x
  3. Step 3: Cross multiply
    354,145.20x = 530,440.20 × 307,489.20
  4. Step 4: Simplify right side
    354,145.20x = 163,104,632,745.84
  5. Step 5: Solve for x
    x = 163,104,632,745.84/354,145.20
  6. Step 6: Final answer
    x = 460,558.64

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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.