Home / 660,280.24-911,190.45-388,359.55

Finding the Fourth Proportional to 660,280.24, 911,190.45 and 388,359.55

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Solution

The fourth proportional to 660,280.24, 911,190.45 and 388,359.55 is: 535,938.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,280.24 : 911,190.45 = 388,359.55 : x
  2. Step 2: Convert to fraction form
    660,280.24/911,190.45 = 388,359.55/x
  3. Step 3: Cross multiply
    660,280.24x = 911,190.45 × 388,359.55
  4. Step 4: Simplify right side
    660,280.24x = 353,869,513,126.30
  5. Step 5: Solve for x
    x = 353,869,513,126.30/660,280.24
  6. Step 6: Final answer
    x = 535,938.37

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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.