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Finding the Fourth Proportional to 673,860.62, 929,817.89 and 398,180.11

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Solution

The fourth proportional to 673,860.62, 929,817.89 and 398,180.11 is: 549,423.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,860.62 : 929,817.89 = 398,180.11 : x
  2. Step 2: Convert to fraction form
    673,860.62/929,817.89 = 398,180.11/x
  3. Step 3: Cross multiply
    673,860.62x = 929,817.89 × 398,180.11
  4. Step 4: Simplify right side
    673,860.62x = 370,234,989,720.17
  5. Step 5: Solve for x
    x = 370,234,989,720.17/673,860.62
  6. Step 6: Final answer
    x = 549,423.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.