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Finding the Fourth Proportional to 645,136.80, 966,538.80 and 551,824.80

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Solution

The fourth proportional to 645,136.80, 966,538.80 and 551,824.80 is: 826,739.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,136.80 : 966,538.80 = 551,824.80 : x
  2. Step 2: Convert to fraction form
    645,136.80/966,538.80 = 551,824.80/x
  3. Step 3: Cross multiply
    645,136.80x = 966,538.80 × 551,824.80
  4. Step 4: Simplify right side
    645,136.80x = 533,360,080,002.24
  5. Step 5: Solve for x
    x = 533,360,080,002.24/645,136.80
  6. Step 6: Final answer
    x = 826,739.51

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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.