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Finding the Fourth Proportional to 721,871.14, 993,899.60 and 635,769.22

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Solution

The fourth proportional to 721,871.14, 993,899.60 and 635,769.22 is: 875,351.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,871.14 : 993,899.60 = 635,769.22 : x
  2. Step 2: Convert to fraction form
    721,871.14/993,899.60 = 635,769.22/x
  3. Step 3: Cross multiply
    721,871.14x = 993,899.60 × 635,769.22
  4. Step 4: Simplify right side
    721,871.14x = 631,890,773,450.31
  5. Step 5: Solve for x
    x = 631,890,773,450.31/721,871.14
  6. Step 6: Final answer
    x = 875,351.21

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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.