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Finding the Fourth Proportional to 645,139.80, 966,543.30 and 551,827.80

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Solution

The fourth proportional to 645,139.80, 966,543.30 and 551,827.80 is: 826,744.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,139.80 : 966,543.30 = 551,827.80 : x
  2. Step 2: Convert to fraction form
    645,139.80/966,543.30 = 551,827.80/x
  3. Step 3: Cross multiply
    645,139.80x = 966,543.30 × 551,827.80
  4. Step 4: Simplify right side
    645,139.80x = 533,365,462,843.74
  5. Step 5: Solve for x
    x = 533,365,462,843.74/645,139.80
  6. Step 6: Final answer
    x = 826,744.01

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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.