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Finding the Fourth Proportional to 660,737.25, 911,740.05 and 388,745.33

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Solution

The fourth proportional to 660,737.25, 911,740.05 and 388,745.33 is: 536,423.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,737.25 : 911,740.05 = 388,745.33 : x
  2. Step 2: Convert to fraction form
    660,737.25/911,740.05 = 388,745.33/x
  3. Step 3: Cross multiply
    660,737.25x = 911,740.05 × 388,745.33
  4. Step 4: Simplify right side
    660,737.25x = 354,434,682,052.77
  5. Step 5: Solve for x
    x = 354,434,682,052.77/660,737.25
  6. Step 6: Final answer
    x = 536,423.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.