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Finding the Fourth Proportional to 220,430.40, 330,645.60 and 115,281.60

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Solution

The fourth proportional to 220,430.40, 330,645.60 and 115,281.60 is: 172,922.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,430.40 : 330,645.60 = 115,281.60 : x
  2. Step 2: Convert to fraction form
    220,430.40/330,645.60 = 115,281.60/x
  3. Step 3: Cross multiply
    220,430.40x = 330,645.60 × 115,281.60
  4. Step 4: Simplify right side
    220,430.40x = 38,117,353,800.96
  5. Step 5: Solve for x
    x = 38,117,353,800.96/220,430.40
  6. Step 6: Final answer
    x = 172,922.40

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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.