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Finding the Fourth Proportional to 321,411.20, 482,116.80 and 99,795.20

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Solution

The fourth proportional to 321,411.20, 482,116.80 and 99,795.20 is: 149,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,411.20 : 482,116.80 = 99,795.20 : x
  2. Step 2: Convert to fraction form
    321,411.20/482,116.80 = 99,795.20/x
  3. Step 3: Cross multiply
    321,411.20x = 482,116.80 × 99,795.20
  4. Step 4: Simplify right side
    321,411.20x = 48,112,942,479.36
  5. Step 5: Solve for x
    x = 48,112,942,479.36/321,411.20
  6. Step 6: Final answer
    x = 149,692.80

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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.