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Finding the Fourth Proportional to 768,200.40, 1,152,300.60 and 724,654.80

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Solution

The fourth proportional to 768,200.40, 1,152,300.60 and 724,654.80 is: 1,086,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,200.40 : 1,152,300.60 = 724,654.80 : x
  2. Step 2: Convert to fraction form
    768,200.40/1,152,300.60 = 724,654.80/x
  3. Step 3: Cross multiply
    768,200.40x = 1,152,300.60 × 724,654.80
  4. Step 4: Simplify right side
    768,200.40x = 835,020,160,832.88
  5. Step 5: Solve for x
    x = 835,020,160,832.88/768,200.40
  6. Step 6: Final answer
    x = 1,086,982.20

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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.