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Finding the Fourth Proportional to 904,728.80, 1,355,124.90 and 727,581.80

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Solution

The fourth proportional to 904,728.80, 1,355,124.90 and 727,581.80 is: 1,089,789.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    904,728.80 : 1,355,124.90 = 727,581.80 : x
  2. Step 2: Convert to fraction form
    904,728.80/1,355,124.90 = 727,581.80/x
  3. Step 3: Cross multiply
    904,728.80x = 1,355,124.90 × 727,581.80
  4. Step 4: Simplify right side
    904,728.80x = 985,964,213,966.82
  5. Step 5: Solve for x
    x = 985,964,213,966.82/904,728.80
  6. Step 6: Final answer
    x = 1,089,789.80

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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.