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Finding the Fourth Proportional to 903,999.90, 1,355,999.85 and 230,079.90

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Solution

The fourth proportional to 903,999.90, 1,355,999.85 and 230,079.90 is: 345,119.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    903,999.90 : 1,355,999.85 = 230,079.90 : x
  2. Step 2: Convert to fraction form
    903,999.90/1,355,999.85 = 230,079.90/x
  3. Step 3: Cross multiply
    903,999.90x = 1,355,999.85 × 230,079.90
  4. Step 4: Simplify right side
    903,999.90x = 311,988,309,888.02
  5. Step 5: Solve for x
    x = 311,988,309,888.02/903,999.90
  6. Step 6: Final answer
    x = 345,119.85

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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.