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Finding the Fourth Proportional to 855,903.40, 1,283,855.10 and 323,441.80

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Solution

The fourth proportional to 855,903.40, 1,283,855.10 and 323,441.80 is: 485,162.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,903.40 : 1,283,855.10 = 323,441.80 : x
  2. Step 2: Convert to fraction form
    855,903.40/1,283,855.10 = 323,441.80/x
  3. Step 3: Cross multiply
    855,903.40x = 1,283,855.10 × 323,441.80
  4. Step 4: Simplify right side
    855,903.40x = 415,252,404,483.18
  5. Step 5: Solve for x
    x = 415,252,404,483.18/855,903.40
  6. Step 6: Final answer
    x = 485,162.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.