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Finding the Fourth Proportional to 292,958.80, 439,438.20 and 135,140.56

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Solution

The fourth proportional to 292,958.80, 439,438.20 and 135,140.56 is: 202,710.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,958.80 : 439,438.20 = 135,140.56 : x
  2. Step 2: Convert to fraction form
    292,958.80/439,438.20 = 135,140.56/x
  3. Step 3: Cross multiply
    292,958.80x = 439,438.20 × 135,140.56
  4. Step 4: Simplify right side
    292,958.80x = 59,385,924,433.39
  5. Step 5: Solve for x
    x = 59,385,924,433.39/292,958.80
  6. Step 6: Final answer
    x = 202,710.84

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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.