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Finding the Fourth Proportional to 485,900.60, 670,855.02 and 304,860.92

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Solution

The fourth proportional to 485,900.60, 670,855.02 and 304,860.92 is: 420,903.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,900.60 : 670,855.02 = 304,860.92 : x
  2. Step 2: Convert to fraction form
    485,900.60/670,855.02 = 304,860.92/x
  3. Step 3: Cross multiply
    485,900.60x = 670,855.02 × 304,860.92
  4. Step 4: Simplify right side
    485,900.60x = 204,517,478,583.82
  5. Step 5: Solve for x
    x = 204,517,478,583.82/485,900.60
  6. Step 6: Final answer
    x = 420,903.94

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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.