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Finding the Fourth Proportional to 660,752.28, 911,760.72 and 388,760.28

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Solution

The fourth proportional to 660,752.28, 911,760.72 and 388,760.28 is: 536,443.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,752.28 : 911,760.72 = 388,760.28 : x
  2. Step 2: Convert to fraction form
    660,752.28/911,760.72 = 388,760.28/x
  3. Step 3: Cross multiply
    660,752.28x = 911,760.72 × 388,760.28
  4. Step 4: Simplify right side
    660,752.28x = 354,456,352,800.20
  5. Step 5: Solve for x
    x = 354,456,352,800.20/660,752.28
  6. Step 6: Final answer
    x = 536,443.63

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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.