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Finding the Fourth Proportional to 641,998.84, 885,957.60 and 355,518.58

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Solution

The fourth proportional to 641,998.84, 885,957.60 and 355,518.58 is: 490,615.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,998.84 : 885,957.60 = 355,518.58 : x
  2. Step 2: Convert to fraction form
    641,998.84/885,957.60 = 355,518.58/x
  3. Step 3: Cross multiply
    641,998.84x = 885,957.60 × 355,518.58
  4. Step 4: Simplify right side
    641,998.84x = 314,974,387,892.21
  5. Step 5: Solve for x
    x = 314,974,387,892.21/641,998.84
  6. Step 6: Final answer
    x = 490,615.20

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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.