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Finding the Fourth Proportional to 641,957.82, 885,901.59 and 355,477.83

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Solution

The fourth proportional to 641,957.82, 885,901.59 and 355,477.83 is: 490,559.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,957.82 : 885,901.59 = 355,477.83 : x
  2. Step 2: Convert to fraction form
    641,957.82/885,901.59 = 355,477.83/x
  3. Step 3: Cross multiply
    641,957.82x = 885,901.59 × 355,477.83
  4. Step 4: Simplify right side
    641,957.82x = 314,918,374,806.75
  5. Step 5: Solve for x
    x = 314,918,374,806.75/641,957.82
  6. Step 6: Final answer
    x = 490,559.29

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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.