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Finding the Fourth Proportional to 415,899.28, 623,897.70 and 145,945

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Solution

The fourth proportional to 415,899.28, 623,897.70 and 145,945 is: 218,934.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,899.28 : 623,897.70 = 145,945 : x
  2. Step 2: Convert to fraction form
    415,899.28/623,897.70 = 145,945/x
  3. Step 3: Cross multiply
    415,899.28x = 623,897.70 × 145,945
  4. Step 4: Simplify right side
    415,899.28x = 91,054,749,826.50
  5. Step 5: Solve for x
    x = 91,054,749,826.50/415,899.28
  6. Step 6: Final answer
    x = 218,934.62

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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.