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Finding the Fourth Proportional to 321,918.10, 482,877.15 and 255,562.90

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Solution

The fourth proportional to 321,918.10, 482,877.15 and 255,562.90 is: 383,344.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,918.10 : 482,877.15 = 255,562.90 : x
  2. Step 2: Convert to fraction form
    321,918.10/482,877.15 = 255,562.90/x
  3. Step 3: Cross multiply
    321,918.10x = 482,877.15 × 255,562.90
  4. Step 4: Simplify right side
    321,918.10x = 123,405,484,797.74
  5. Step 5: Solve for x
    x = 123,405,484,797.74/321,918.10
  6. Step 6: Final answer
    x = 383,344.35

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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.