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Finding the Fourth Proportional to 641,674.26, 885,499.74 and 355,188.20

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Solution

The fourth proportional to 641,674.26, 885,499.74 and 355,188.20 is: 490,153.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,674.26 : 885,499.74 = 355,188.20 : x
  2. Step 2: Convert to fraction form
    641,674.26/885,499.74 = 355,188.20/x
  3. Step 3: Cross multiply
    641,674.26x = 885,499.74 × 355,188.20
  4. Step 4: Simplify right side
    641,674.26x = 314,519,054,323.57
  5. Step 5: Solve for x
    x = 314,519,054,323.57/641,674.26
  6. Step 6: Final answer
    x = 490,153.76

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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.