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Finding the Fourth Proportional to 292,905.60, 439,228.80 and 135,052.80

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Solution

The fourth proportional to 292,905.60, 439,228.80 and 135,052.80 is: 202,519.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,905.60 : 439,228.80 = 135,052.80 : x
  2. Step 2: Convert to fraction form
    292,905.60/439,228.80 = 135,052.80/x
  3. Step 3: Cross multiply
    292,905.60x = 439,228.80 × 135,052.80
  4. Step 4: Simplify right side
    292,905.60x = 59,319,079,280.64
  5. Step 5: Solve for x
    x = 59,319,079,280.64/292,905.60
  6. Step 6: Final answer
    x = 202,519.44

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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.