Home / 427,655.10-641,625.18-143,373.78

Finding the Fourth Proportional to 427,655.10, 641,625.18 and 143,373.78

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Solution

The fourth proportional to 427,655.10, 641,625.18 and 143,373.78 is: 215,108.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,655.10 : 641,625.18 = 143,373.78 : x
  2. Step 2: Convert to fraction form
    427,655.10/641,625.18 = 143,373.78/x
  3. Step 3: Cross multiply
    427,655.10x = 641,625.18 × 143,373.78
  4. Step 4: Simplify right side
    427,655.10x = 91,992,227,399.78
  5. Step 5: Solve for x
    x = 91,992,227,399.78/427,655.10
  6. Step 6: Final answer
    x = 215,108.45

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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.