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Finding the Fourth Proportional to 571,999.28, 789,348.48 and 317,345

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Solution

The fourth proportional to 571,999.28, 789,348.48 and 317,345 is: 437,930.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,999.28 : 789,348.48 = 317,345 : x
  2. Step 2: Convert to fraction form
    571,999.28/789,348.48 = 317,345/x
  3. Step 3: Cross multiply
    571,999.28x = 789,348.48 × 317,345
  4. Step 4: Simplify right side
    571,999.28x = 250,495,793,385.60
  5. Step 5: Solve for x
    x = 250,495,793,385.60/571,999.28
  6. Step 6: Final answer
    x = 437,930.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.