Home / 428,899.50-643,349.25-293,830.38

Finding the Fourth Proportional to 428,899.50, 643,349.25 and 293,830.38

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Solution

The fourth proportional to 428,899.50, 643,349.25 and 293,830.38 is: 440,745.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,899.50 : 643,349.25 = 293,830.38 : x
  2. Step 2: Convert to fraction form
    428,899.50/643,349.25 = 293,830.38/x
  3. Step 3: Cross multiply
    428,899.50x = 643,349.25 × 293,830.38
  4. Step 4: Simplify right side
    428,899.50x = 189,035,554,600.22
  5. Step 5: Solve for x
    x = 189,035,554,600.22/428,899.50
  6. Step 6: Final answer
    x = 440,745.57

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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.