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Finding the Fourth Proportional to 490,561.20, 676,855.80 and 286,496.28

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Solution

The fourth proportional to 490,561.20, 676,855.80 and 286,496.28 is: 395,295.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,561.20 : 676,855.80 = 286,496.28 : x
  2. Step 2: Convert to fraction form
    490,561.20/676,855.80 = 286,496.28/x
  3. Step 3: Cross multiply
    490,561.20x = 676,855.80 × 286,496.28
  4. Step 4: Simplify right side
    490,561.20x = 193,916,668,796.42
  5. Step 5: Solve for x
    x = 193,916,668,796.42/490,561.20
  6. Step 6: Final answer
    x = 395,295.57

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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.