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Finding the Fourth Proportional to 641,876.36, 885,817.02 and 355,396.40

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Solution

The fourth proportional to 641,876.36, 885,817.02 and 355,396.40 is: 490,462.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,876.36 : 885,817.02 = 355,396.40 : x
  2. Step 2: Convert to fraction form
    641,876.36/885,817.02 = 355,396.40/x
  3. Step 3: Cross multiply
    641,876.36x = 885,817.02 × 355,396.40
  4. Step 4: Simplify right side
    641,876.36x = 314,816,179,966.73
  5. Step 5: Solve for x
    x = 314,816,179,966.73/641,876.36
  6. Step 6: Final answer
    x = 490,462.34

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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.