Home / 660,405.14-911,307.48-388,483.28

Finding the Fourth Proportional to 660,405.14, 911,307.48 and 388,483.28

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Solution

The fourth proportional to 660,405.14, 911,307.48 and 388,483.28 is: 536,076.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,405.14 : 911,307.48 = 388,483.28 : x
  2. Step 2: Convert to fraction form
    660,405.14/911,307.48 = 388,483.28/x
  3. Step 3: Cross multiply
    660,405.14x = 911,307.48 × 388,483.28
  4. Step 4: Simplify right side
    660,405.14x = 354,027,718,918.93
  5. Step 5: Solve for x
    x = 354,027,718,918.93/660,405.14
  6. Step 6: Final answer
    x = 536,076.56

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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.