Home / 831,999.60-1,247,999.40-512,665.20

Finding the Fourth Proportional to 831,999.60, 1,247,999.40 and 512,665.20

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Solution

The fourth proportional to 831,999.60, 1,247,999.40 and 512,665.20 is: 768,997.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,999.60 : 1,247,999.40 = 512,665.20 : x
  2. Step 2: Convert to fraction form
    831,999.60/1,247,999.40 = 512,665.20/x
  3. Step 3: Cross multiply
    831,999.60x = 1,247,999.40 × 512,665.20
  4. Step 4: Simplify right side
    831,999.60x = 639,805,862,000.88
  5. Step 5: Solve for x
    x = 639,805,862,000.88/831,999.60
  6. Step 6: Final answer
    x = 768,997.80

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1.5x scale

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.