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Finding the Fourth Proportional to 911,698.40, 1,368,778.80 and 533,007.20

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Solution

The fourth proportional to 911,698.40, 1,368,778.80 and 533,007.20 is: 800,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,698.40 : 1,368,778.80 = 533,007.20 : x
  2. Step 2: Convert to fraction form
    911,698.40/1,368,778.80 = 533,007.20/x
  3. Step 3: Cross multiply
    911,698.40x = 1,368,778.80 × 533,007.20
  4. Step 4: Simplify right side
    911,698.40x = 729,568,955,607.36
  5. Step 5: Solve for x
    x = 729,568,955,607.36/911,698.40
  6. Step 6: Final answer
    x = 800,230.60

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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.