Home / 428,974.72-643,466.67-129,457.98

Finding the Fourth Proportional to 428,974.72, 643,466.67 and 129,457.98

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Solution

The fourth proportional to 428,974.72, 643,466.67 and 129,457.98 is: 194,188.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,974.72 : 643,466.67 = 129,457.98 : x
  2. Step 2: Convert to fraction form
    428,974.72/643,466.67 = 129,457.98/x
  3. Step 3: Cross multiply
    428,974.72x = 643,466.67 × 129,457.98
  4. Step 4: Simplify right side
    428,974.72x = 83,301,897,951.26
  5. Step 5: Solve for x
    x = 83,301,897,951.26/428,974.72
  6. Step 6: Final answer
    x = 194,188.36

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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.