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Finding the Fourth Proportional to 429,513.45, 644,269.36 and 113,945.55

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Solution

The fourth proportional to 429,513.45, 644,269.36 and 113,945.55 is: 170,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,513.45 : 644,269.36 = 113,945.55 : x
  2. Step 2: Convert to fraction form
    429,513.45/644,269.36 = 113,945.55/x
  3. Step 3: Cross multiply
    429,513.45x = 644,269.36 × 113,945.55
  4. Step 4: Simplify right side
    429,513.45x = 73,411,622,782.27
  5. Step 5: Solve for x
    x = 73,411,622,782.27/429,513.45
  6. Step 6: Final answer
    x = 170,918.10

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1.5x scale

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.