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Finding the Fourth Proportional to 491,168.40, 677,805.93 and 276,308.40

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Solution

The fourth proportional to 491,168.40, 677,805.93 and 276,308.40 is: 381,301.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,168.40 : 677,805.93 = 276,308.40 : x
  2. Step 2: Convert to fraction form
    491,168.40/677,805.93 = 276,308.40/x
  3. Step 3: Cross multiply
    491,168.40x = 677,805.93 × 276,308.40
  4. Step 4: Simplify right side
    491,168.40x = 187,283,472,028.81
  5. Step 5: Solve for x
    x = 187,283,472,028.81/491,168.40
  6. Step 6: Final answer
    x = 381,301.96

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1.5x scale

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.