Home / 641,964.50-885,900.10-355,478.43

Finding the Fourth Proportional to 641,964.50, 885,900.10 and 355,478.43

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Solution

The fourth proportional to 641,964.50, 885,900.10 and 355,478.43 is: 490,554.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,964.50 : 885,900.10 = 355,478.43 : x
  2. Step 2: Convert to fraction form
    641,964.50/885,900.10 = 355,478.43/x
  3. Step 3: Cross multiply
    641,964.50x = 885,900.10 × 355,478.43
  4. Step 4: Simplify right side
    641,964.50x = 314,918,376,684.84
  5. Step 5: Solve for x
    x = 314,918,376,684.84/641,964.50
  6. Step 6: Final answer
    x = 490,554.19

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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.