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Finding the Fourth Proportional to 641,998.72, 885,957.43 and 355,518.46

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Solution

The fourth proportional to 641,998.72, 885,957.43 and 355,518.46 is: 490,615.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,998.72 : 885,957.43 = 355,518.46 : x
  2. Step 2: Convert to fraction form
    641,998.72/885,957.43 = 355,518.46/x
  3. Step 3: Cross multiply
    641,998.72x = 885,957.43 × 355,518.46
  4. Step 4: Simplify right side
    641,998.72x = 314,974,215,820.58
  5. Step 5: Solve for x
    x = 314,974,215,820.58/641,998.72
  6. Step 6: Final answer
    x = 490,615.03

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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.