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Finding the Fourth Proportional to 641,930.40, 885,913.44 and 355,476.96

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Solution

The fourth proportional to 641,930.40, 885,913.44 and 355,476.96 is: 490,585.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,930.40 : 885,913.44 = 355,476.96 : x
  2. Step 2: Convert to fraction form
    641,930.40/885,913.44 = 355,476.96/x
  3. Step 3: Cross multiply
    641,930.40x = 885,913.44 × 355,476.96
  4. Step 4: Simplify right side
    641,930.40x = 314,921,816,474.34
  5. Step 5: Solve for x
    x = 314,921,816,474.34/641,930.40
  6. Step 6: Final answer
    x = 490,585.61

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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.