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Finding the Fourth Proportional to 289,308.60, 399,041.10 and 248,952.78

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Solution

The fourth proportional to 289,308.60, 399,041.10 and 248,952.78 is: 343,378.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,308.60 : 399,041.10 = 248,952.78 : x
  2. Step 2: Convert to fraction form
    289,308.60/399,041.10 = 248,952.78/x
  3. Step 3: Cross multiply
    289,308.60x = 399,041.10 × 248,952.78
  4. Step 4: Simplify right side
    289,308.60x = 99,342,391,179.26
  5. Step 5: Solve for x
    x = 99,342,391,179.26/289,308.60
  6. Step 6: Final answer
    x = 343,378.63

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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.