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Finding the Fourth Proportional to 485,335.84, 669,765.71 and 281,507.44

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Solution

The fourth proportional to 485,335.84, 669,765.71 and 281,507.44 is: 388,481.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,335.84 : 669,765.71 = 281,507.44 : x
  2. Step 2: Convert to fraction form
    485,335.84/669,765.71 = 281,507.44/x
  3. Step 3: Cross multiply
    485,335.84x = 669,765.71 × 281,507.44
  4. Step 4: Simplify right side
    485,335.84x = 188,544,030,421.88
  5. Step 5: Solve for x
    x = 188,544,030,421.88/485,335.84
  6. Step 6: Final answer
    x = 388,481.57

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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.