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Finding the Fourth Proportional to 1,103,936.80, 1,655,905.20 and 472,914.40

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Solution

The fourth proportional to 1,103,936.80, 1,655,905.20 and 472,914.40 is: 709,371.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,103,936.80 : 1,655,905.20 = 472,914.40 : x
  2. Step 2: Convert to fraction form
    1,103,936.80/1,655,905.20 = 472,914.40/x
  3. Step 3: Cross multiply
    1,103,936.80x = 1,655,905.20 × 472,914.40
  4. Step 4: Simplify right side
    1,103,936.80x = 783,101,414,114.88
  5. Step 5: Solve for x
    x = 783,101,414,114.88/1,103,936.80
  6. Step 6: Final answer
    x = 709,371.60

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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.