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Finding the Fourth Proportional to 223,888.18, 308,728.90 and 172,909.21

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Solution

The fourth proportional to 223,888.18, 308,728.90 and 172,909.21 is: 238,431.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,888.18 : 308,728.90 = 172,909.21 : x
  2. Step 2: Convert to fraction form
    223,888.18/308,728.90 = 172,909.21/x
  3. Step 3: Cross multiply
    223,888.18x = 308,728.90 × 172,909.21
  4. Step 4: Simplify right side
    223,888.18x = 53,382,070,203.17
  5. Step 5: Solve for x
    x = 53,382,070,203.17/223,888.18
  6. Step 6: Final answer
    x = 238,431.84

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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.