Home / 1,391,005.40-2,085,989.70-492,099.80

Finding the Fourth Proportional to 1,391,005.40, 2,085,989.70 and 492,099.80

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Solution

The fourth proportional to 1,391,005.40, 2,085,989.70 and 492,099.80 is: 737,966.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,005.40 : 2,085,989.70 = 492,099.80 : x
  2. Step 2: Convert to fraction form
    1,391,005.40/2,085,989.70 = 492,099.80/x
  3. Step 3: Cross multiply
    1,391,005.40x = 2,085,989.70 × 492,099.80
  4. Step 4: Simplify right side
    1,391,005.40x = 1,026,515,114,172.06
  5. Step 5: Solve for x
    x = 1,026,515,114,172.06/1,391,005.40
  6. Step 6: Final answer
    x = 737,966.30

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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.