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Finding the Fourth Proportional to 660,745.38, 911,751.26 and 388,753.45

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Solution

The fourth proportional to 660,745.38, 911,751.26 and 388,753.45 is: 536,434.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,745.38 : 911,751.26 = 388,753.45 : x
  2. Step 2: Convert to fraction form
    660,745.38/911,751.26 = 388,753.45/x
  3. Step 3: Cross multiply
    660,745.38x = 911,751.26 × 388,753.45
  4. Step 4: Simplify right side
    660,745.38x = 354,446,447,866.85
  5. Step 5: Solve for x
    x = 354,446,447,866.85/660,745.38
  6. Step 6: Final answer
    x = 536,434.24

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1.5x scale

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.