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Finding the Fourth Proportional to 720,091.60, 1,080,007.80 and 453,374.80

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Solution

The fourth proportional to 720,091.60, 1,080,007.80 and 453,374.80 is: 679,980.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,091.60 : 1,080,007.80 = 453,374.80 : x
  2. Step 2: Convert to fraction form
    720,091.60/1,080,007.80 = 453,374.80/x
  3. Step 3: Cross multiply
    720,091.60x = 1,080,007.80 × 453,374.80
  4. Step 4: Simplify right side
    720,091.60x = 489,648,320,323.44
  5. Step 5: Solve for x
    x = 489,648,320,323.44/720,091.60
  6. Step 6: Final answer
    x = 679,980.60

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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.