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Finding the Fourth Proportional to 831,698.20, 1,245,473.70 and 665,810.20

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Solution

The fourth proportional to 831,698.20, 1,245,473.70 and 665,810.20 is: 997,055.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,698.20 : 1,245,473.70 = 665,810.20 : x
  2. Step 2: Convert to fraction form
    831,698.20/1,245,473.70 = 665,810.20/x
  3. Step 3: Cross multiply
    831,698.20x = 1,245,473.70 × 665,810.20
  4. Step 4: Simplify right side
    831,698.20x = 829,249,093,291.74
  5. Step 5: Solve for x
    x = 829,249,093,291.74/831,698.20
  6. Step 6: Final answer
    x = 997,055.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.