Home / 457,699.20-686,548.80-388,579.20

Finding the Fourth Proportional to 457,699.20, 686,548.80 and 388,579.20

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Solution

The fourth proportional to 457,699.20, 686,548.80 and 388,579.20 is: 582,868.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,699.20 : 686,548.80 = 388,579.20 : x
  2. Step 2: Convert to fraction form
    457,699.20/686,548.80 = 388,579.20/x
  3. Step 3: Cross multiply
    457,699.20x = 686,548.80 × 388,579.20
  4. Step 4: Simplify right side
    457,699.20x = 266,778,583,464.96
  5. Step 5: Solve for x
    x = 266,778,583,464.96/457,699.20
  6. Step 6: Final answer
    x = 582,868.80

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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.