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Finding the Fourth Proportional to 290,462.60, 435,693.90 and 103,480.20

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Solution

The fourth proportional to 290,462.60, 435,693.90 and 103,480.20 is: 155,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,462.60 : 435,693.90 = 103,480.20 : x
  2. Step 2: Convert to fraction form
    290,462.60/435,693.90 = 103,480.20/x
  3. Step 3: Cross multiply
    290,462.60x = 435,693.90 × 103,480.20
  4. Step 4: Simplify right side
    290,462.60x = 45,085,691,910.78
  5. Step 5: Solve for x
    x = 45,085,691,910.78/290,462.60
  6. Step 6: Final answer
    x = 155,220.30

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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.