Home / 428,032.20-642,310.74-191,574.84

Finding the Fourth Proportional to 428,032.20, 642,310.74 and 191,574.84

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Solution

The fourth proportional to 428,032.20, 642,310.74 and 191,574.84 is: 287,479.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,032.20 : 642,310.74 = 191,574.84 : x
  2. Step 2: Convert to fraction form
    428,032.20/642,310.74 = 191,574.84/x
  3. Step 3: Cross multiply
    428,032.20x = 642,310.74 × 191,574.84
  4. Step 4: Simplify right side
    428,032.20x = 123,050,577,245.78
  5. Step 5: Solve for x
    x = 123,050,577,245.78/428,032.20
  6. Step 6: Final answer
    x = 287,479.72

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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.