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Finding the Fourth Proportional to 1,230,512.80, 1,845,769.20 and 755,658.40

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Solution

The fourth proportional to 1,230,512.80, 1,845,769.20 and 755,658.40 is: 1,133,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,512.80 : 1,845,769.20 = 755,658.40 : x
  2. Step 2: Convert to fraction form
    1,230,512.80/1,845,769.20 = 755,658.40/x
  3. Step 3: Cross multiply
    1,230,512.80x = 1,845,769.20 × 755,658.40
  4. Step 4: Simplify right side
    1,230,512.80x = 1,394,771,000,441.28
  5. Step 5: Solve for x
    x = 1,394,771,000,441.28/1,230,512.80
  6. Step 6: Final answer
    x = 1,133,487.60

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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.