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Finding the Fourth Proportional to 290,218.60, 435,522.30 and 132,365.80

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Solution

The fourth proportional to 290,218.60, 435,522.30 and 132,365.80 is: 198,637.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,218.60 : 435,522.30 = 132,365.80 : x
  2. Step 2: Convert to fraction form
    290,218.60/435,522.30 = 132,365.80/x
  3. Step 3: Cross multiply
    290,218.60x = 435,522.30 × 132,365.80
  4. Step 4: Simplify right side
    290,218.60x = 57,648,257,657.34
  5. Step 5: Solve for x
    x = 57,648,257,657.34/290,218.60
  6. Step 6: Final answer
    x = 198,637.36

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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.