Home / 280,130.56-386,455.04-172,661.36

Finding the Fourth Proportional to 280,130.56, 386,455.04 and 172,661.36

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Solution

The fourth proportional to 280,130.56, 386,455.04 and 172,661.36 is: 238,195.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,130.56 : 386,455.04 = 172,661.36 : x
  2. Step 2: Convert to fraction form
    280,130.56/386,455.04 = 172,661.36/x
  3. Step 3: Cross multiply
    280,130.56x = 386,455.04 × 172,661.36
  4. Step 4: Simplify right side
    280,130.56x = 66,725,852,785.25
  5. Step 5: Solve for x
    x = 66,725,852,785.25/280,130.56
  6. Step 6: Final answer
    x = 238,195.55

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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.