Home / 457,801.20-687,263.40-289,321.20

Finding the Fourth Proportional to 457,801.20, 687,263.40 and 289,321.20

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Solution

The fourth proportional to 457,801.20, 687,263.40 and 289,321.20 is: 434,336.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,801.20 : 687,263.40 = 289,321.20 : x
  2. Step 2: Convert to fraction form
    457,801.20/687,263.40 = 289,321.20/x
  3. Step 3: Cross multiply
    457,801.20x = 687,263.40 × 289,321.20
  4. Step 4: Simplify right side
    457,801.20x = 198,839,871,604.08
  5. Step 5: Solve for x
    x = 198,839,871,604.08/457,801.20
  6. Step 6: Final answer
    x = 434,336.72

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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.