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Finding the Fourth Proportional to 551,885.20, 826,078.20 and 394,421.20

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Solution

The fourth proportional to 551,885.20, 826,078.20 and 394,421.20 is: 590,381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,885.20 : 826,078.20 = 394,421.20 : x
  2. Step 2: Convert to fraction form
    551,885.20/826,078.20 = 394,421.20/x
  3. Step 3: Cross multiply
    551,885.20x = 826,078.20 × 394,421.20
  4. Step 4: Simplify right side
    551,885.20x = 325,822,754,937.84
  5. Step 5: Solve for x
    x = 325,822,754,937.84/551,885.20
  6. Step 6: Final answer
    x = 590,381.40

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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.