Home / 386,821.12-533,811.72-217,054.84

Finding the Fourth Proportional to 386,821.12, 533,811.72 and 217,054.84

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Solution

The fourth proportional to 386,821.12, 533,811.72 and 217,054.84 is: 299,534.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,821.12 : 533,811.72 = 217,054.84 : x
  2. Step 2: Convert to fraction form
    386,821.12/533,811.72 = 217,054.84/x
  3. Step 3: Cross multiply
    386,821.12x = 533,811.72 × 217,054.84
  4. Step 4: Simplify right side
    386,821.12x = 115,866,417,474.73
  5. Step 5: Solve for x
    x = 115,866,417,474.73/386,821.12
  6. Step 6: Final answer
    x = 299,534.88

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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.