Home / 428,272.32-642,209.04-191,616.96

Finding the Fourth Proportional to 428,272.32, 642,209.04 and 191,616.96

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Solution

The fourth proportional to 428,272.32, 642,209.04 and 191,616.96 is: 287,336.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,272.32 : 642,209.04 = 191,616.96 : x
  2. Step 2: Convert to fraction form
    428,272.32/642,209.04 = 191,616.96/x
  3. Step 3: Cross multiply
    428,272.32x = 642,209.04 × 191,616.96
  4. Step 4: Simplify right side
    428,272.32x = 123,058,143,929.32
  5. Step 5: Solve for x
    x = 123,058,143,929.32/428,272.32
  6. Step 6: Final answer
    x = 287,336.21

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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.