Home / 660,240.92-911,136.20-388,320.28

Finding the Fourth Proportional to 660,240.92, 911,136.20 and 388,320.28

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Solution

The fourth proportional to 660,240.92, 911,136.20 and 388,320.28 is: 535,884.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,240.92 : 911,136.20 = 388,320.28 : x
  2. Step 2: Convert to fraction form
    660,240.92/911,136.20 = 388,320.28/x
  3. Step 3: Cross multiply
    660,240.92x = 911,136.20 × 388,320.28
  4. Step 4: Simplify right side
    660,240.92x = 353,812,660,082.69
  5. Step 5: Solve for x
    x = 353,812,660,082.69/660,240.92
  6. Step 6: Final answer
    x = 535,884.17

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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.