Home / 660,319.17-911,227.77-388,416.75

Finding the Fourth Proportional to 660,319.17, 911,227.77 and 388,416.75

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Solution

The fourth proportional to 660,319.17, 911,227.77 and 388,416.75 is: 536,007.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,319.17 : 911,227.77 = 388,416.75 : x
  2. Step 2: Convert to fraction form
    660,319.17/911,227.77 = 388,416.75/x
  3. Step 3: Cross multiply
    660,319.17x = 911,227.77 × 388,416.75
  4. Step 4: Simplify right side
    660,319.17x = 353,936,128,933.15
  5. Step 5: Solve for x
    x = 353,936,128,933.15/660,319.17
  6. Step 6: Final answer
    x = 536,007.65

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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.