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Finding the Fourth Proportional to 873,200.90, 1,309,801.35 and 831,866.60

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Solution

The fourth proportional to 873,200.90, 1,309,801.35 and 831,866.60 is: 1,247,799.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,200.90 : 1,309,801.35 = 831,866.60 : x
  2. Step 2: Convert to fraction form
    873,200.90/1,309,801.35 = 831,866.60/x
  3. Step 3: Cross multiply
    873,200.90x = 1,309,801.35 × 831,866.60
  4. Step 4: Simplify right side
    873,200.90x = 1,089,579,995,699.91
  5. Step 5: Solve for x
    x = 1,089,579,995,699.91/873,200.90
  6. Step 6: Final answer
    x = 1,247,799.90

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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.