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Finding the Fourth Proportional to 642,310.43, 886,323.80 and 355,776.98

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Solution

The fourth proportional to 642,310.43, 886,323.80 and 355,776.98 is: 490,936.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,310.43 : 886,323.80 = 355,776.98 : x
  2. Step 2: Convert to fraction form
    642,310.43/886,323.80 = 355,776.98/x
  3. Step 3: Cross multiply
    642,310.43x = 886,323.80 × 355,776.98
  4. Step 4: Simplify right side
    642,310.43x = 315,333,601,651.64
  5. Step 5: Solve for x
    x = 315,333,601,651.64/642,310.43
  6. Step 6: Final answer
    x = 490,936.45

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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.