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Finding the Fourth Proportional to 353,809.20, 530,746.20 and 143,403.60

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Solution

The fourth proportional to 353,809.20, 530,746.20 and 143,403.60 is: 215,118.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,809.20 : 530,746.20 = 143,403.60 : x
  2. Step 2: Convert to fraction form
    353,809.20/530,746.20 = 143,403.60/x
  3. Step 3: Cross multiply
    353,809.20x = 530,746.20 × 143,403.60
  4. Step 4: Simplify right side
    353,809.20x = 76,110,915,766.32
  5. Step 5: Solve for x
    x = 76,110,915,766.32/353,809.20
  6. Step 6: Final answer
    x = 215,118.53

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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.