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Finding the Fourth Proportional to 641,601.90, 885,431.52 and 369,648.45

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Solution

The fourth proportional to 641,601.90, 885,431.52 and 369,648.45 is: 510,126.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,601.90 : 885,431.52 = 369,648.45 : x
  2. Step 2: Convert to fraction form
    641,601.90/885,431.52 = 369,648.45/x
  3. Step 3: Cross multiply
    641,601.90x = 885,431.52 × 369,648.45
  4. Step 4: Simplify right side
    641,601.90x = 327,298,388,949.14
  5. Step 5: Solve for x
    x = 327,298,388,949.14/641,601.90
  6. Step 6: Final answer
    x = 510,126.90

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Double scale
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1.5x scale

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.