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Finding the Fourth Proportional to 551,421.90, 826,039.35 and 485,666.10

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Solution

The fourth proportional to 551,421.90, 826,039.35 and 485,666.10 is: 727,536.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,421.90 : 826,039.35 = 485,666.10 : x
  2. Step 2: Convert to fraction form
    551,421.90/826,039.35 = 485,666.10/x
  3. Step 3: Cross multiply
    551,421.90x = 826,039.35 × 485,666.10
  4. Step 4: Simplify right side
    551,421.90x = 401,179,309,561.04
  5. Step 5: Solve for x
    x = 401,179,309,561.04/551,421.90
  6. Step 6: Final answer
    x = 727,536.05

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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.