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Finding the Fourth Proportional to 321,203.80, 481,805.70 and 288,026.20

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Solution

The fourth proportional to 321,203.80, 481,805.70 and 288,026.20 is: 432,039.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,203.80 : 481,805.70 = 288,026.20 : x
  2. Step 2: Convert to fraction form
    321,203.80/481,805.70 = 288,026.20/x
  3. Step 3: Cross multiply
    321,203.80x = 481,805.70 × 288,026.20
  4. Step 4: Simplify right side
    321,203.80x = 138,772,664,909.34
  5. Step 5: Solve for x
    x = 138,772,664,909.34/321,203.80
  6. Step 6: Final answer
    x = 432,039.30

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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.