Home / 380,986.65-525,785.16-211,220.78

Finding the Fourth Proportional to 380,986.65, 525,785.16 and 211,220.78

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Solution

The fourth proportional to 380,986.65, 525,785.16 and 211,220.78 is: 291,497.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,986.65 : 525,785.16 = 211,220.78 : x
  2. Step 2: Convert to fraction form
    380,986.65/525,785.16 = 211,220.78/x
  3. Step 3: Cross multiply
    380,986.65x = 525,785.16 × 211,220.78
  4. Step 4: Simplify right side
    380,986.65x = 111,056,748,978.70
  5. Step 5: Solve for x
    x = 111,056,748,978.70/380,986.65
  6. Step 6: Final answer
    x = 291,497.74

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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.