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Finding the Fourth Proportional to 660,532.55, 911,519.44 and 388,617.92

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Solution

The fourth proportional to 660,532.55, 911,519.44 and 388,617.92 is: 536,283.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,532.55 : 911,519.44 = 388,617.92 : x
  2. Step 2: Convert to fraction form
    660,532.55/911,519.44 = 388,617.92/x
  3. Step 3: Cross multiply
    660,532.55x = 911,519.44 × 388,617.92
  4. Step 4: Simplify right side
    660,532.55x = 354,232,790,119.62
  5. Step 5: Solve for x
    x = 354,232,790,119.62/660,532.55
  6. Step 6: Final answer
    x = 536,283.63

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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.